CVE-2026-76413: Cisco Secure Firewall Management Center Software Single Sign-On Token Forgery of Administrator Account Vulnerability
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.
Affected Software
Event History
Frequently Asked Questions
What access does an attacker need to exploit this issue?
The issue is exploitable remotely without authentication or user interaction. The attacker needs to perform session-token forgery against the Cisco ASDM SSO handler.
What is the likely operational impact of a successful exploit?
An attacker can log in as the Cisco ASDM administrator user. By repeatedly doing so, they can keep legitimate administrators locked out of ASDM indefinitely.
Which component should be prioritized for investigation and remediation?
Prioritize the Cisco Adaptive Security Device Manager single sign-on handler in Cisco Secure FMC Software. The provided information does not identify affected versions, default exposure conditions, or available mitigations.