Riskcovery

CVE-2026-20236

Multiple Cisco Products Snort 3 Software Hardening Release: October 2026

State
Published
Severity
7.5 High
Published
Oct 21, 2026
Updated
Oct 22, 2026
Reserved
Oct 8, 2025

Read the record on cve.org

Description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco owned Open Source Snort 3 Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.

The vulnerabilities tracked by CVE-2026-20236 are related to issues concerning incorrect calculation that are grouped under the Common Weakness Enumeration (CWE) Base CWE-682.

Scores

CVSSScoreVectorSource
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hcisco

Weaknesses

Affected Products

ProductVersions
Cisco Cyber VisionCisco
  • 3.0.0Affected
  • 3.0.2Affected
  • 3.0.3Affected
  • 3.0.1Affected
  • 3.1.0Affected
  • 3.0.4Affected
  • 3.1.1Affected
  • 3.1.2Affected
  • 3.2.0Affected
  • 3.0.5Affected
  • 3.2.1Affected
  • 3.0.6Affected
  • 3.2.2Affected
  • 3.2.3Affected
  • 3.2.4Affected
  • 4.0.0Affected
  • 4.0.1Affected
  • 4.0.2Affected
  • 4.0.3Affected
  • 4.1.0Affected
  • 4.1.1Affected
  • 4.1.2Affected
  • 4.1.3Affected
  • 4.1.4Affected
  • 4.2.0Affected
  • and 40 more versions
Cisco Open Source Snort3Cisco
  • 3.12.2.0Affected
  • 3.1.2.0Affected
  • 3.1.3.0Affected
  • 3.1.4.0Affected
  • 3.1.5.0Affected
  • 3.1.6.0Affected
  • 3.1.7.0Affected
  • 3.1.8.0Affected
  • 3.1.9.0Affected
  • 3.1.10.0Affected
  • 3.1.12.0Affected
  • 3.1.13.0Affected
  • 3.1.14.0Affected
  • 3.1.15.0Affected
  • 3.1.16.0Affected
  • 3.1.17.0Affected
  • 3.1.18.0Affected
  • 3.1.19.0Affected
  • 3.1.20.0Affected
  • 3.1.21.0Affected
  • 3.1.22.0Affected
  • 3.1.23.0Affected
  • 3.1.24.0Affected
  • 3.1.25.0Affected
  • 3.1.27.0Affected
  • and 80 more versions
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 35 more versions
Cisco UTD SNORT IPS Engine SoftwareCisco
  • 17.12.1aAffected
  • 17.12.2Affected
  • 17.13.1aAffected
  • 17.12.3Affected
  • 17.14.1aAffected
  • 17.12.4Affected
  • 17.12.3aAffected
  • 17.15.1aAffected
  • 17.16.1aAffected
  • 17.12.4aAffected
  • 17.15.2cAffected
  • 17.12.4bAffected
  • 17.15.2aAffected
  • 17.12.5Affected
  • 17.17.1Affected
  • 17.12.5aAffected
  • 17.15.3aAffected
  • 17.15.3Affected
  • 17.12.5bAffected
  • 17.12.5cAffected
  • 17.15.4Affected
  • 17.18.1Affected
  • 17.18.1aAffected
  • 17.12.6Affected
  • 17.15.4cAffected
  • and 13 more versions

References

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