CISA

October 'In Trend VM' Report: Exploited Windows ALPC and Check Point VPN Vulnerabilities

Positive Technologies has released its October edition of the 'In Trend VM' digest, highlighting two actively exploited vulnerabilities. The first is CVE-2026-85880, a local privilege escalation flaw in the Windows ALPC mechanism that was used as a zero-day in targeted attacks by multiple APT clusters. The second is CVE-2026-85102, a critical remote code execution vulnerability in Check Point Security Gateway and Spark Firewall products that affects VPN negotiation. Both issues have been added to CISA's KEV catalog, with public proof-of-concept code already available for the Check Point flaw. The report details attack chains, affected versions, and recommended patches or workarounds.

US Department of Homeland Security Orders Federal Agencies to Remove DeepSeek Products

The US Department of Homeland Security issued an order on October 19 requiring federal civilian agencies to cease purchasing products from DeepSeek and to remove related technology from government systems. The directive, published the following day, targets Hangzhou DeepSeek Artificial Intelligence, its affiliates, and any third-party products or services built on DeepSeek implementations. The measure stems from the Federal Acquisition Supply Chain Security Act of 2018 and follows a recommendation by the Federal Acquisition Security Council, though no specific incidents or evidence were detailed in the notice. The restriction applies only to federal environments and does not prohibit private sector or individual use outside government systems. No removal deadline was set, and the document does not name the signing authority. The order is filed under docket DHS-2026-0628 with the CISA implementation team listed as the contact point.

CISA Adds BeyondTrust Remote Support and Fortinet Flaws to KEV Catalog Following Zero-Day Exploitation by ARMORY CASTLE

The US Cybersecurity and Infrastructure Security Agency has added two vulnerabilities affecting Fortinet and BeyondTrust products to its Known Exploited Vulnerabilities catalog. CVE-2026-102764 is an authentication bypass flaw in BeyondTrust Remote Support that allows remote attackers to manipulate appliance files without credentials due to insufficient source validation. BeyondTrust released an advisory on October 15, 2026, rating the issue 9.3 on CVSS v4.0 as Critical. Mandiant attributes the zero-day exploitation to the suspected Chinese group ARMORY CASTLE, which deployed web shells for persistence and privilege escalation in late August. The second CVE, CVE-2025-61624, also appears on the KEV list but lacks further public technical details in the current advisory. Organizations are urged to apply patches immediately to prevent further compromise.

CISA Adds Five Exploited Vulnerabilities to KEV Catalog Including AhsayCBS Authentication and Command Injection Flaws

The US Cybersecurity and Infrastructure Security Agency (CISA) has added five vulnerabilities to its Known Exploited Vulnerabilities catalog after confirming active exploitation in the wild. Four vulnerabilities were registered on October 14, 2026, and one additional entry followed on October 15. Among the newly listed issues are two critical flaws affecting the AhsayCBS backup management server: CVE-2026-105133, an authentication bypass in the API, and CVE-2026-105134, a command injection vulnerability in the replication feature. When chained together, the pair allows unauthenticated remote attackers to execute arbitrary operating system commands. Vendor Ahsay has released hotfixes in versions 10.3.4.45 and 9.15.2.70 because standard patches cannot fully address the issues. The advisory also references vulnerabilities in Atlassian products and multiple network security solutions from other vendors.

Three Zero-Days Chained in Ivanti Connect Secure Grant Root Access Without Login

An attacker chained three zero-day vulnerabilities in Ivanti Connect Secure to execute commands as root without authentication. The compromised appliance was running the fully patched version 22.8R2.4 when exploitation began on October 3. Volexity discovered the intrusion, attributed the activity to UTA0576 with low confidence in criminal rather than espionage motives, and reported the flaws to the vendor. Ivanti acknowledged limited in-the-wild exploitation on October 13. The first two issues, an authentication bypass and remote code execution, were combined under CVE-2026-104935 with a CVSS score of 8.6, allowing code execution as the cgi-server user. A third privilege-escalation flaw then elevated access to root. The final flaw lacked a patch at disclosure time, with a fix promised in an upcoming release. CISA classified the exploitation as active with total technical impact.

GreyNoise Detects Active Exploitation Attempts of CVE-2021-36260 Against Hikvision Cameras

GreyNoise recorded exploitation attempts targeting CVE-2021-36260 in Hikvision cameras and recorders between September 21 and October 1. The vulnerability carries a CVSS score of 9.8 and allows unauthenticated remote command execution through insufficient input validation in the embedded web server. Attack traffic originated from four IP addresses, three routed through a commercial VPN in Lithuania and one from a Ukrainian residential network, with all targets located in Ukraine. Attackers leveraged a publicly available Nuclei template to probe devices, though GreyNoise confirmed only scanning activity and not successful compromises. The five-year-old flaw remains actively scanned despite an available firmware patch from Hikvision and a CISA advisory recommending immediate updates. Password changes provide no protection because the attack requires no authentication. Defenders are advised to apply firmware updates, remove devices from public internet exposure, and segment video surveillance networks from critical infrastructure.

Cisco Confirms Active Exploitation of CVE-2026-76504 in Catalyst SD-WAN Manager

Cisco has confirmed that the critical vulnerability CVE-2026-76504 in Catalyst SD-WAN Manager has been exploited in attacks throughout September. The flaw carries a CVSS score of 9.8 and allows attackers to gain full administrator access without any credentials by bypassing API authentication through malformed URI encoding. The issue affects the login session handling mechanism, enabling forged requests to grant netadmin privileges by default. Similar URI manipulation techniques were observed earlier this month in Oracle PeopleSoft attacks. Patches are available across multiple release trains including 20.9.10.1, 20.12.8.2, 20.15.6.1, 20.18.4.1, 26.1.2.1 and 26.2.1, while older installations must migrate to supported versions. Cisco recommends restricting access to trusted hosts and placing the Manager behind firewalls until updates are applied. The vulnerability was discovered during routine support operations and verified by Cisco's Product Security Incident Response Team.

CISA Adds Two Critical Citrix NetScaler Flaws to Known Exploited Vulnerabilities Catalog

The CISA has added two critical vulnerabilities affecting Citrix NetScaler ADC and Gateway to its Known Exploited Vulnerabilities catalog following reports of active global exploitation. Both CVE-2026-88771 and CVE-2026-88772 carry a CVSS score of 9.5 and were patched by Citrix on September 27, the same day they were added to the catalog. The first flaw stems from improper input validation and allows unauthenticated arbitrary command execution on default installations. The second issue involves a buffer overflow that can lead to remote code execution or denial of service when DTLS is enabled on VPN virtual servers. Affected versions include 14.1-73.32, 13.1-63.21 and earlier, with fixes available in 14.1-73.37, 13.1-64.23 and later releases including FIPS variants. The issues were identified by watchTowr on September 26, and Citrix confirmed ongoing attacks against unpatched systems. Organizations are advised to apply patches immediately while preserving evidence and following full incident response procedures.

Apple Releases macOS Updates to Fix CoreGraphics Vulnerability Possibly Exploited in Targeted iOS Attacks

Apple has issued security updates for multiple macOS versions to address a serious vulnerability in the CoreGraphics framework. The flaw, tracked as CVE-2026-86950, involves an out-of-bounds write that could allow arbitrary code execution when processing specially crafted files. The company also noted that the same issue may have been exploited in sophisticated, targeted attacks against older versions of iOS. CISA assigned the vulnerability a CVSS v3.1 base score of 8.8, classifying it as High severity. Patches are now available in macOS Tahoe 26.7.1, macOS Sequoia 15.8.1, and the latest macOS Golden Gate 27.0.1 release.

Apple Releases iOS 26.7.1 and iPadOS 26.7.1 to Fix CoreGraphics Vulnerability Possibly Exploited in Targeted Attacks

Apple has issued iOS 26.7.1 and iPadOS 26.7.1 to address a high-severity vulnerability in the CoreGraphics framework. The flaw, tracked as CVE-2026-86950, could allow arbitrary code execution when processing a specially crafted file due to an out-of-bounds write. The company stated that the issue may have been exploited in sophisticated, targeted attacks against specific individuals on versions prior to iOS 27. CISA assigned the vulnerability a CVSS v3.1 base score of 8.8, classifying it as High severity. On the same day, Apple also released iOS 27.0.1 and iPadOS 27.0.1, though those updates did not reference CVE-2026-86950. The patches close a vector that could be abused for remote code execution in image rendering components.

CISA Sets September 30 Deadline for Federal Agencies to Patch Actively Exploited Citrix NetScaler Zero-Days

CISA has ordered U.S. federal agencies to apply patches by September 30 for two actively exploited zero-day vulnerabilities in Citrix NetScaler ADC and NetScaler Gateway. The flaws, tracked as CVE-2026-88771 and CVE-2026-88772, enable unauthenticated remote code execution under default configurations and affect systems commonly exposed to the internet. CVE-2026-88771 allows remote code execution without authentication on NetScaler ADC and Gateway, while CVE-2026-88772 can trigger remote code execution or denial of service via a memory overflow when DTLS is enabled on VPN vServers. Citrix has released fixes for versions 14.1 and 13.1, including FIPS and NDcPP builds, with minimum required builds of 14.1-73.37 and 13.1-64.23. The advisory also covers six additional vulnerabilities from CVE-2026-88773 to CVE-2026-88778 involving HTTP request smuggling and TCP ISN prediction issues. Unsupported branches NetScaler 12.1 and 13.0 receive no patches, requiring immediate migration. Organizations are advised to inventory instances, check for compromise indicators before patching, and preserve forensic evidence.

CISA Adds Three Actively Exploited Linux Kernel Vulnerabilities to KEV Catalog

The U.S. Cybersecurity and Infrastructure Security Agency has added three vulnerabilities affecting the Linux Kernel to its Known Exploited Vulnerabilities catalog. The flaws, identified as CVE-2025-39682, CVE-2026-53266, and CVE-2025-39964, are confirmed to be under active exploitation in the wild. CISA is directing all federal agencies to apply patches immediately and to search for indicators of compromise. The vulnerabilities impact the kernel's kTLS TLS processing, the ebtables network bridge component, and the AF_ALG cryptographic interface. Each issue can lead to memory corruption or inconsistent internal state that attackers may leverage for privilege escalation or remote code execution.

BIND DNS Servers Receive Patches for 14 Vulnerabilities Including High-Severity DoS Flaws

The Internet Systems Consortium has released BIND 9 updates that address 14 vulnerabilities across multiple versions of the widely used DNS server software. Seven of the issues received a CVSS score of 7.5 and were rated high severity, while the remaining seven scored between 5.3 and 6.5. The most critical flaw allows an unauthenticated attacker to crash the named process with a single malformed SIG(0) request over DNS over HTTPS. Additional vulnerabilities enable cache poisoning through forged NXDOMAIN responses, downgraded secure delegations, and acceptance of unsigned answers, as well as resource exhaustion via uncontrolled cache growth and excessive CPU consumption. Affected releases span BIND 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, and 9.21.0 through 9.21.25. No workarounds exist, making immediate upgrades to versions 9.20.29, 9.21.26, or 9.20.29-S1 the only mitigation. The ISC reports no known exploitation in the wild and none of the flaws appear in CISA’s Known Exploited Vulnerabilities catalog.

Cisco Confirms Active Exploitation of Critical Secure Email Gateway Flaw Allowing Root Command Execution

Cisco has confirmed active exploitation of a critical vulnerability in its Secure Email Gateway product that allows attackers to execute arbitrary commands with root privileges. The flaw, tracked as CVE-2026-76461 with a CVSS score of 9.8, stems from insufficient input validation in the message analysis logic of AsyncOS. Attackers can trigger the issue by sending a specially crafted email containing malicious SQL instructions, which leads to arbitrary SQL command execution and full root access on affected appliances. The vulnerability impacts physical and virtual deployments running AsyncOS versions 15.5 and earlier, 16.0, and 16.5. Patches are available in versions 15.5.5-0141, 16.0.4-302, and 16.5.0-780, while the Secure Email and Web Manager and Secure Web Appliance remain unaffected. CISA added the CVE to its Known Exploited Vulnerabilities catalog on September 14 and set a September 17 remediation deadline for federal agencies.

CISA Adds MikroTik RouterOS Flaws CVE-2026-67277 and CVE-2026-86060 to Known Exploited Vulnerabilities Catalog

The US Cybersecurity and Infrastructure Security Agency has added two actively exploited vulnerabilities in MikroTik RouterOS to its Known Exploited Vulnerabilities Catalog. CVE-2026-86060 stems from improper sanitization of command argument delimiters and can lead to privilege escalation after an attacker gains access to the SSH login helper and alters trusted policy masks. CVE-2026-67277 involves missing authentication checks in critical RouterOS functions, allowing connections before authentication completes and potentially leaking kernel memory or causing denial-of-service conditions. CISA directed US federal agencies to apply mitigations by September 13 and specifically investigate any signs of compromise related to CVE-2026-86060. The agency noted that the flaws carry broader exploitation risk and urged all organizations using affected MikroTik products to take immediate action.

CISA Adds Four Actively Exploited Vulnerabilities to KEV Catalog Including Cisco FMC and Fortinet FortiOS

The US Cybersecurity and Infrastructure Security Agency has added four vulnerabilities to its Known Exploited Vulnerabilities catalog, warning that they are being actively exploited in the wild. The flaws affect Cisco Secure Firewall Management Center, Security Cloud Control, Fortinet FortiOS, FortiSwitchManager, and Citrix NetScaler products. One vulnerability allows attackers to bypass authentication and gain root privileges through crafted HTTP requests. Another is a heap-based buffer overflow that enables execution of unauthorized code or commands via specially crafted packets. CISA issued the update on September 9, 2026, urging organizations to apply patches immediately. The agency continues to track these issues as part of its ongoing efforts to mitigate real-world threats.

Critical Vulnerabilities in PaperCut NG and PaperCut MF Exploited in the Wild

PaperCut Software has disclosed two serious vulnerabilities in its printing management solutions PaperCut NG and PaperCut MF. The issues were detailed in an advisory published on August 27, 2026, followed by emergency patches. Exploitation has already been confirmed in customer environments. CVE-2026-81578 stems from improper access controls in the web management interface, allowing unauthenticated remote changes to system settings. CVE-2026-82078 involves insecure dynamic class loading in database connections, enabling arbitrary Java bytecode execution with server privileges when combined with the first flaw. CVSS scores are 9.4 (Critical) and 8.8 (High) respectively, and both vulnerabilities have been added to CISA’s Known Exploited Vulnerabilities Catalog.

Over 8,300 Gitea Servers Remain Exposed to Remote Code Execution via CVE-2026-60004

Thousands of publicly accessible Gitea instances were still unpatched against CVE-2026-60004 as of late August 2026, leaving them open to remote command execution. The critical vulnerability combines abuse of the diffpatch endpoint with the ability to install and trigger attacker-controlled Git hooks, allowing unauthenticated attackers to run commands on the server. Exploitation requires only write access to a repository, which is often trivial due to default open user registration in many deployments. The issue was fixed in Gitea 1.27.1 released on July 27, 2026, and CISA added the flaw to its Known Exploited Vulnerabilities catalog with a remediation deadline of August 28 for U.S. federal agencies. In observed incidents, attackers used the access to deploy cryptocurrency miners inside Docker containers. A related authentication bypass affecting the official Docker image, CVE-2026-20896, was also noted when reverse-proxy headers such as X-WEBAUTH-USER are enabled.

CISA Adds Actively Exploited Zimbra CVE-2026-73570 to KEV Catalog with Immediate Patching Deadline

CISA has added CVE-2026-73570 affecting Zimbra Collaboration Suite to its Known Exploited Vulnerabilities catalog, ordering urgent remediation due to confirmed active exploitation. The flaw enables unauthenticated remote command execution on servers where the optional zimbra-snmp package is installed and SNMP notifications are enabled. Exploitation occurs via specially crafted SMTP requests that trigger operating system command injection under the privileges of the zimbra user. Zimbra released the fix in version 10.1.20 on July 20, 2026, while CISA placed the vulnerability in the KEV list on August 21 and set an August 24 deadline for federal civilian agencies. Organizations are advised to first verify exposure by checking for zimbra-snmp and SNMP notification settings before applying the update. Post-patch steps include validating the version, controlled service restarts, and hunting for indicators such as unexpected Zimbra restarts, anomalous zimbra user activity, and new files in sensitive directories like /opt/zimbra/jetty/webapps/. The directive highlights the critical nature of pre-authentication flaws in internet-facing mail servers that process untrusted inbound traffic.

CISA Adds Zimbra Collaboration Suite CVE-2026-73570 to KEV Catalog After Confirmed Exploitation

US authorities have issued a warning about active exploitation of a vulnerability in the Zimbra Collaboration Suite. CISA added the OS command injection flaw CVE-2026-73570 to its Known Exploited Vulnerabilities catalog on August 21, 2026, marking the fifth such entry for the year. The issue resides in the SNMP monitoring component and allows unauthenticated attackers to execute arbitrary operating system commands with Zimbra user privileges when SNMP notifications are enabled. MITRE rated the vulnerability 8.9 on CVSS v3.1, classifying it as High severity. Federal agencies must apply mitigations by August 24, while all organizations using the product are urged to prioritize patching to prevent further abuse.

JetBrains TeamCity CVE-2026-63077 Actively Exploited in the Wild, JPCERT Urges Immediate Patching and Breach Investigation

A critical deserialization vulnerability tracked as CVE-2026-63077 has been discovered in JetBrains TeamCity, allowing unauthenticated remote code execution through the agent polling protocol. The flaw was privately reported to JetBrains on July 10, 2026, and publicly disclosed on July 27 with patches released in TeamCity 2026.1.3 and 2025.11.7. Following disclosure, active exploitation was confirmed, prompting CISA to add the vulnerability to its Known Exploited Vulnerabilities Catalog on August 5 and mandate federal agencies to remediate by August 8. JetBrains issued its own exploitation warning on August 7. JPCERT/CC has verified that affected versions remain in use within Japan and notes that public exploit code is now available, recommending organizations verify their deployments, apply updates promptly, and conduct compromise assessments.

CISA Adds JetBrains TeamCity CVE-2026-63077 to Known Exploited Vulnerabilities Catalog After Active Attacks

The US Cybersecurity and Infrastructure Security Agency has added a critical vulnerability in JetBrains TeamCity to its Known Exploited Vulnerabilities catalog due to confirmed exploitation in the wild. The flaw, tracked as CVE-2026-63077, stems from unsafe deserialization of untrusted data over the agent polling protocol and permits unauthenticated remote code execution. TeamCity is widely used for automating software build, test, and deployment pipelines in development environments. CISA directed all US federal agencies to apply vendor mitigations within three days, by August 8, 2026. Organizations running the continuous integration server are urged to review exposure and implement the recommended fixes immediately to prevent further compromise.

SOC Incident Analysis Exposes Active Exploitation of CVE-2025-53770 SharePoint ToolShell Auth Bypass and RCE

A detailed walkthrough of Letsdefend SOC342 demonstrates how analysts detected and confirmed exploitation of CVE-2025-53770 targeting SharePoint servers. The alert was triggered by a suspicious unauthenticated POST request to ToolPane.aspx carrying an unusually large payload and a spoofed referer. Investigation revealed that the vulnerable server accepted the request, after which PowerShell commands extracted ASP.NET cryptographic keys, enabling ViewState forgery and remote code execution. Attackers then compiled and dropped additional payloads using csc.exe and created a malicious spinstall0.aspx page that leveraged WScript.Shell to download further malware. Network indicators included the malicious IP 107.191.58.76 flagged by CISA and multiple VirusTotal detections. The server was isolated, files removed, and cryptographic keys rotated to contain the breach.

Russian State-Supported Group LAUNDRY BEAR Exploits Zero-Day CVE-2025-66376 in Zimbra Collaboration Suite

Synacor’s Zimbra Collaboration Suite was targeted in a zero-day campaign by the Russian state-backed threat actor known as LAUNDRY BEAR. The stored cross-site scripting flaw in the webmail stylesheet handler allowed attackers to steal past emails simply by having victims view a specially crafted HTML message. No user interaction beyond opening the email was required for JavaScript execution in the browser. On 23 July 2026, sixteen countries including the United States, European nations and Australia issued a joint advisory signed by twenty-seven agencies such as NSA, FBI and CISA. The vulnerability received CVE-2025-66376 and a CVSS v3.1 base score of 7.2, rated High. Analysts assess the campaign focused on intelligence collection against Western government and corporate targets.

CISA Adds Three Exploited Vulnerabilities in FortiSandbox and SharePoint to KEV Catalog

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added three actively exploited vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog on July 16, 2026. Two of the flaws affect Fortinet’s FortiSandbox malware analysis product and involve OS command injection issues that can be triggered via specially crafted HTTP requests without requiring authentication. The third vulnerability impacts Microsoft SharePoint and stems from unsafe deserialization of untrusted data, potentially allowing remote code execution over the network. CISA’s action follows public advisories released by the vendors in April and June 2026. The agency is urging organizations to apply available patches and mitigations immediately to reduce the risk of compromise.

CISA Urges Immediate Patching as Multiple SharePoint Server Vulnerabilities Confirmed Exploited

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has issued an urgent advisory after confirming active exploitation of multiple vulnerabilities in Microsoft SharePoint Server. Four specific CVEs have been added to the Known Exploited Vulnerabilities (KEV) catalog, with one additional flaw flagged by Microsoft as high-risk even without confirmed exploitation. Successful attacks can lead to remote code execution, theft of Internet Information Services (IIS) machine keys, establishment of persistent access, and deployment of malware. CISA recommends applying the latest Microsoft patches immediately, verifying successful installation, enabling the Antimalware Scan Interface (AMSI), and strengthening monitoring through Microsoft Defender Antivirus. Organizations are also advised to avoid direct internet exposure of SharePoint servers and to implement Layer 7 reverse proxies with enhanced logging to reduce the attack surface.

SonicWall Issues Emergency Hotfixes After Detecting Active Exploitation of Two Zero-Day Vulnerabilities in SMA1000 Appliances

SonicWall has confirmed active exploitation of two zero-day vulnerabilities in its SMA1000 series appliances, prompting the immediate release of hotfixes and a strict compliance deadline for U.S. federal agencies. The first flaw, CVE-2026-15409, carries a critical CVSS score of 10.0 and allows unauthenticated server-side request forgery (SSRF) through the Appliance Work Place interface, enabling attackers to force the device to make unauthorized requests to internal services. The second vulnerability, CVE-2026-15410, rated CVSS 7.2, permits authenticated code injection via the Appliance Management Console, allowing administrators to execute operating system commands. Affected models include SMA6210, SMA7210, and SMA8200v running specific vulnerable platform versions such as 12.4.3-03245 through 12.5.0-02800. CISA has added both CVEs to its Known Exploited Vulnerabilities catalog, requiring federal agencies to patch or decommission impacted systems by July 17, 2026. Indicators of compromise and recommended response actions, including log analysis and potential appliance reimaging, have been published to help organizations detect and mitigate potential intrusions.