CVE-2026-76413
Cisco Secure Firewall Management Center Software Single Sign-On Token Forgery of Administrator Account Vulnerability
Description
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.
Weakness: CWE-1259
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Secure Firewall Management Center Check your version | Network & Security Management | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco Secure Firewall Management Center (FMC)
Vendor advisory
cisco-sa-fmc2-multivulns-HXgcqRG
Cisco Secure Firewall Management Center Software Vulnerabilities
Cisco’s rating: Critical (advisory CVSS 9.0) · Published Sep 16, 2026
Bug IDs: CSCwu12566 , CSCwu16965 , CSCwu27279
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from