CVE-2026-76418 Cisco Secure Firewall ASA & FTD - Denial of Service

Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software contain a denial of service caused by logic errors in Remote Access SSL VPN secondary authentication, letting unauthenticated remote attackers cause device reloads, exploit requires crafted request to SSL VPN.

CVSS base score 8.6 /10
High
CISA KEV
Exploited in the wild
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Published
28 October 2026
Updated
29 October 2026
Weakness
CWE-690

Vendor fix

Update to the latest available version of Cisco Secure Firewall ASA and FTD Software.

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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