CVE-2026-76413: high-severity vulnerability in Cisco Secure Firewall Management Center (FMC)
Cisco Secure Firewall Management Center Software Single Sign-On Token Forgery of Administrator Account Vulnerability
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.2epss 0.5%
A vulnerability in Cisco Adaptive Security Device Manager (ASDM) single sign-on (SSO) handler for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to log in as the Cisco ASDM administrator user.
This vulnerability is due to improper management of the Cisco ASDM SSO token. An attacker could exploit this vulnerability by performing session token forgery techniques. A successful exploit could allow the attacker to log in as the administrator user and, by repeating this action, keep legitimate administrators locked out of the ASDM indefinitely.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Affected products
Cisco · Cisco Secure Firewall Management Center (FMC)Related CVEs — Cisco Secure Firewall Management Center (FMC)
In the same product, most dangerous first.
CVE-2026-20079CRITICALCisco Secure Firewall Management Center Authentication Bypass Remote Code Execution VulnerabilityEPSS 88.7%KEVCVE-2026-20131CRITICALCisco Secure Firewall Management Center Software Remote Code Execution VulnerabilityEPSS 44.4%KEVCVE-2026-20316MEDIUMCisco Secure Firewall Management Center Software Static Credential VulnerabilityEPSS 35.1%KEVCVE-2026-20242CRITICALCisco Secure Firewall Management Center Software Java Deserialization Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-20340HIGHCisco Secure Firewall Management Center Software Deserialization Arbitrary Root Command Execution VulnerabilityEPSS 0.7%CVE-2026-20343HIGHCisco Secure Firewall Management Center Software Information Disclosure and Disk Denial of Service VulnerabilityEPSS 0.7%