MeridianMeridian

Cisco Patches 14 Vulnerabilities in NX-OS Software, Four Rated Critical

Cisco Systems has released security updates addressing 14 vulnerabilities in its Cisco NX-OS Software used in network devices. Four of the seven security advisories published on October 7, 2026, are rated Critical, while three are rated Medium. Several critical issues affect the Cisco Nexus 3000 Series and Nexus 9000 Series switches, impacting features such as NGOAM, MPLS OAM, and the NX-API management interface. Seven vulnerabilities received CVSSv3.1 base scores of 9.0 or higher, with multiple flaws enabling remote code execution as root or denial-of-service conditions. Specific CVEs including CVE-2026-76485, CVE-2026-76486, and CVE-2026-76501 stem from input validation failures in the NGOAM feature and may require SRv6 or NV Overlay configurations to be exploitable. The advisories also cover control plane denial-of-service issues, Python sandbox escapes, and endpoint group contract bypasses in ACI mode.

Security NEXTTranslated from Japanese

Read at source

Cisco Systems has released security updates to address 14 vulnerabilities in its Cisco NX-OS Software, the operating system powering many enterprise network devices. The company published seven security advisories on October 7, 2026, covering the issues.

Four advisories received a Critical severity rating and three were rated Medium. The critical advisories primarily affect Cisco Nexus 3000 Series and Cisco Nexus 9000 Series switches, targeting the network operations monitoring feature NGOAM, MPLS OAM, and the NX-API management interface.

Seven individual vulnerabilities received CVSSv3.1 base scores of 9.0 or higher. The flaws CVE-2026-76485, CVE-2026-76486, and CVE-2026-76501 result from insufficient input validation in NGOAM. Crafted IP packets can lead to remote code execution with root privileges or denial-of-service conditions. Exploitation of some issues requires specific SRv6 or NV Overlay configurations.

Additional advisories address control plane denial-of-service conditions, Python sandbox escape vulnerabilities, and an endpoint group contract bypass affecting Nexus 9000 Series Fabric Switches in ACI mode.

Nexus 9000 SeriesCisco NX-OSNexus 3000 SeriesCVE-2026-76485CVE-2026-76486CVE-2026-76501NX-API
ShareXFacebookLinkedInReddit
Meridian digestThe week's most consequential security stories, distilled into one briefing.See the digest

More in Vulnerabilities & Exploits

Telegram for Android Patches Voice Call Vulnerability Enabling Code Execution
Vulnerabilities & Exploits

Telegram for Android Patches Voice Call Vulnerability Enabling Code Execution

Security researchers at NebuSec disclosed a vulnerability in Telegram for Android that allowed remote code execution after a victim answered a voice call. The flaw affected versions from 8.6.2 through 12.10.3 and was fixed in release 12.10.4 at the end of September. The issue stemmed from improper handling of MediaState service messages that carry microphone, camera, and video rotation data during calls. When a required field was missing, the application accessed invalid memory. NebuSec discovered the bug using its Code Security product running on a GPT-5.4 model and confirmed exploitation on ARM64 Android devices for personal calls. A demonstration showed the string “HACKED BY NEBUSEC” appearing roughly 30 seconds after the call was accepted. The vulnerability is unrelated to the earlier animated-sticker attack vector.

AntiMalwareOct 29, 2026Translated from Russian

Yandex Patches Millions of Stations After eMudhra Certificate Keys Compromised
Vulnerabilities & Exploits

Yandex Patches Millions of Stations After eMudhra Certificate Keys Compromised

Yandex has automatically deployed security updates to millions of its smart speakers and partner televisions running YaOS between October 21 and 23. The patches address compromised intermediate certificates issued by eMudhra whose private keys consisted of trivial values from 1 to 255. Attackers who obtained these keys could generate fraudulent certificates and perform man-in-the-middle attacks against device HTTPS traffic. Enthusiasts demonstrated that local network control combined with the certificates allowed replacement of server configuration, activation of ADB, and acquisition of root access on the devices. The update removes trust in the affected certificates, overwrites compromised system files, and disables the debug interface. A factory reset restores the vulnerable firmware, so Yandex advises against resets without a compelling reason.

AntiMalwareOct 29, 2026Translated from Russian

Cisco ASA and FTD Face DoS Vulnerability in SSL VPN Already Exploited in the Wild
Vulnerabilities & Exploits

Cisco ASA and FTD Face DoS Vulnerability in SSL VPN Already Exploited in the Wild

Cisco Systems has disclosed a denial-of-service vulnerability affecting its Cisco Secure Firewall ASA and Cisco Secure Firewall FTD products. The flaw, tracked as CVE-2026-76418, resides in the SSL VPN remote access feature and carries a CVSS v3.1 base score of 8.6, rated High severity. Exploitation occurs when secondary authentication is configured on tunnel groups, allowing an attacker to send a crafted request that forces a device reboot without requiring authentication. Cisco confirmed active exploitation of the issue in October 2026. Security updates addressing the vulnerability are now available for both affected product lines. The advisory recommends immediate application of the patches to prevent service disruption.

Security NEXTOct 29, 2026Translated from Japanese