Cisco FMC

CVE-2026-20349: Cisco ASA and FTD Firewalls Face Remote DoS in SSL VPN, Already Exploited

Cisco has disclosed a high-severity denial-of-service vulnerability affecting its Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense products. The flaw, tracked as CVE-2026-20349, resides in the SSL VPN component and allows unauthenticated remote attackers to trigger device reboots by sending specially crafted HTTP requests. The issue also impacts FTD deployments using Zero Trust Network Access. With a CVSS v3.1 base score of 8.6, the vulnerability has already been observed in active exploitation campaigns since August 2026. Cisco released hotfixes for both affected platforms and strongly urges immediate updates, while confirming that Secure Firewall Management Center remains unaffected.

Weekly Roundup: Critical Vulnerabilities Hit VMware ESX, FortiOS, Chrome, fastjson, Cisco FMC and Ruby on Rails

Security NEXT published its list of the ten most-read articles for the week of July 26 to August 1, 2026. The ranking is dominated by high-severity vulnerabilities affecting widely deployed enterprise platforms. VMware released fixes for serious flaws in ESX and vCenter, while Fortinet confirmed active exploitation of vulnerabilities in FortiOS and VeloCloud Orchestrator. Google patched 370 security issues in Chrome, and a data-conversion library fastjson was found vulnerable with observed attacks. Apple shipped iOS 26.6 and iPadOS 26.6 containing fixes for 87 vulnerabilities, and Cisco warned that its Firewall Management Center is already being exploited. Additional patches addressed OpenAM, Node.js, and a critical flaw dubbed KindaRails2Shell in Ruby on Rails. The list also includes a breach at an ANA Group e-commerce site that may have exposed customer data.

Cisco Secure Firewall Management Center Patched for Hardcoded Credential Vulnerability CVE-2026-20316 Already Exploited in the Wild

Cisco Systems has disclosed and patched a hardcoded credential vulnerability in its Cisco Secure Firewall Management Center (FMC) product that allows remote attackers to log in and access sensitive information. The flaw, tracked as CVE-2026-20316, affects the web interface and carries a CVSS v3.1 base score of 5.3, yet Cisco rated it High severity due to the risk of privilege escalation when chained with other vulnerabilities. Zero-day exploitation was observed in July 2026, prompting immediate action from both the vendor and U.S. authorities. CISA added the issue to its Known Exploited Vulnerabilities catalog on the same day and directed federal agencies to apply mitigations by August 1. The advisory highlights that the static credentials enable low-privileged access that could be leveraged for more severe attacks. Cisco released the security advisory on July 29, 2026, and urged customers to update their deployments promptly.