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Cisco has revealed that three distinct threat clusters linked to ransomware and state-sponsored attacks have been exploiting two recently patched Secure Firewall Management Center (FMC) vulnerabilities. The attacks leverage CVE-2026-20079 (CVSS score: 10.0), an authentication bypass vulnerability in the web interface of FMC software that could allow an unauthenticated, remote attacker to bypass
State-sponsored and financially-motivated attackers are actively exploiting CVE-2026-20079, a critical authentication bypass vulnerability in Cisco Secure Firewall Management Center (FMC), which is used for centrally managing multiple Cisco Secure Firewall devices across a network. Two FMC vulnerabilities under active attack “Cisco Talos is actively tracking the exploitation of two vulnerabilities in Cisco’s Secure Firewall Management Center (FMC) Software,” the company’s researchers confirmed on Wednesday. These are the above mentioned CVE-2026-20079 and CVE-2026-20316, which Cisco flagged … More → The post Cisco FMC bugs exploited by nation-state and ransomware actors (CVE-2026-20079, CVE-2026-20316) appeared first on Help Net Security .
Serial number: AV26-197 Date: March 5, 2026 Updated: September 9, 2026 On March 4, 2026, Cisco published security advisories to address vulnerabilities in the following products. Included were critical updates for the following: Cisco Security Cloud Control (SCC) Firewall Management – all versions Cisco Secure Firewall Management Center (FMC) – all versions Cisco Secure Firewall Adaptive Security Appliance (ASA) – versions prior to 9.20.4.14 Cisco Secure Firewall Threat Defense (FTD) – all versions Update 1 On March 18, 2026, Cisco stated that CVE-2026-20131 is being actively exploited. Update 2 On March 19, 2026, Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2026-20131 to their Known Exploited Vulnerabilities (KEV) Database. Update 3 On September 9, 2026, Cybersecurity and Infrastructure Security Agency (CISA) added CVE-2026-20079 to their Known Exploited Vulnerabilities (KEV) Database. The Cyber Centre encourages users and administrators to review the provided web links, perform the suggested recommendations, and apply the necessary updates when available. Cisco Secure Firewall Management Center Software Authentication Bypass Vulnerability Cisco Secure Firewal