SB2026010777 - Cisco Secure FTD Software update for Snort

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Main Vulnerability Database SB2026010777

SB2026010777 - Cisco Secure FTD Software update for Snort

Published: January 7, 2026 Updated: January 29, 2026

Security Bulletin ID SB2026010777
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2026-20026)

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

The vulnerability exists due to a use-after-free error when processing DCE/RPC requests. A remote non-authenticated attacker can send a large number of DCE/RPC requests through an established connection that is inspected by Snort, trigger a use-after-free read and perform a denial of service attack against the Snort 3 Detection Engine.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.


2) Out-of-bounds read (CVE-ID: CVE-2026-20027)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when handling DCE/RPC requests. A remote attacker can send a large number of DCE/RPC requests through an established connection that is inspected by Snort 3 and obtain sensitive information in the Snort 3 data stream.


Remediation

Install update from vendor's website.

References