CVE-2026-76413 Cisco Adaptive Security Device Manager - Authentication Bypass

Cisco Adaptive Security Device Manager (ASDM) for Cisco Secure FMC Software contains an authentication bypass caused by improper management of the ASDM SSO token, letting unauthenticated remote attackers log in as administrator, exploit requires session token forgery.

CVSS base score 8.2 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.46% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Published
16 September 2026
Updated
15 October 2026
Weakness
CWE-1259

Vendor fix

Update to the latest version with the fix for ASDM SSO token management.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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