SB2026102852 - Remote denial of service in Cisco ASA and FTD

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026102852

SB2026102852 - Remote denial of service in Cisco ASA and FTD

Published: October 28, 2026

Security Bulletin ID SB2026102852
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Unchecked Return Value to NULL Pointer Dereference (CVE-ID: CVE-2026-76418) Exploited

CWE-ID: CWE-690 - Unchecked Return Value to NULL Pointer Dereference

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a logic error when secondary authentication is configured on a tunnel group. A remote attacker can send specially crafted request when connecting to the SSL remote access VPN and perform a denial of service attack.

Note, the vulnerability is being actively exploited in the wild.


Remediation

Install update from vendor's website.

References