Riskcovery

CVE-2026-20290

Cisco Secure Firewall Threat Defense Software Snort 2 SSL/TLS Denial of Service Vulnerability

State
Published
Severity
5.8 Medium
Published
Sep 16, 2026
Updated
Sep 17, 2026
Reserved
Oct 8, 2025

Read the record on cve.org

Description

A vulnerability in SSL/TLS certificate parsing in the Snort 2 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 2 Detection Engine to restart.

This vulnerability is due to incomplete validation of the SSL certificate. An attacker could exploit this vulnerability by sending a crafted SSL connection setup request to be parsed by Snort 2. A successful exploit could allow the attacker to cause the Snort 2 Detection Engine to restart unexpectedly, resulting in a denial of service (DoS) condition.

Scores

CVSSScoreVectorSource
3.15.8 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Lcisco

Weaknesses

  • CWE-805 Buffer Access with Incorrect Length Value

Affected Products

ProductVersions
Cisco Secure Firewall Threat Defense (FTD) SoftwareCisco
  • 7.0.0Affected
  • 7.0.0.1Affected
  • 7.0.1Affected
  • 7.0.1.1Affected
  • 7.0.2Affected
  • 7.2.0Affected
  • 7.0.2.1Affected
  • 7.0.3Affected
  • 7.2.0.1Affected
  • 7.0.4Affected
  • 7.2.1Affected
  • 7.0.5Affected
  • 7.3.0Affected
  • 7.2.2Affected
  • 7.2.3Affected
  • 7.3.1Affected
  • 7.2.4Affected
  • 7.0.6Affected
  • 7.2.5Affected
  • 7.2.4.1Affected
  • 7.3.1.1Affected
  • 7.4.0Affected
  • 7.0.6.1Affected
  • 7.2.5.1Affected
  • 7.4.1Affected
  • and 30 more versions

References

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