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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-20356

Multiple Cisco Products Snort 3 Software Hardening Release: October 2026

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
cisco

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-2026-20356 are related to issues concerning uncontrolled resource consumption that are grouped under the Common Weakness Enumeration (CWE) Base CWE-400.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Cisco Cisco Cyber Vision

Default version status: unknown

  • 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
  • 4.2.1affected
  • 4.1.5affected
  • 4.2.2affected
  • 4.2.Xaffected
  • 4.2.3affected
  • 4.2.4affected
  • 4.2.6affected
  • 4.1.6affected
  • 4.3.0affected
  • 4.3.1affected
  • 4.3.2affected
  • 4.3.3affected
  • 4.4.0affected
  • 4.4.1affected
  • 4.4.2affected
  • 4.4.3affected
  • 4.1.7affected
  • 5.0.0affected
  • 5.0.1affected
  • 5.0.2affected
  • 5.1.0affected
  • 5.1.1affected
  • 5.1.2affected
  • 5.1.3affected
  • 5.2.0affected
  • 5.2.1affected
  • 5.3.0affected
  • 5.3.1affected
  • 5.3.2affected
  • 5.3.3affected
  • 5.5.1affected
  • 5.6.1affected
  • 5.4.0affected
  • 5.4.1affected
  • 5.4.2affected
  • 5.7.0affected
  • 5.8.1affected
  • 5.7.1affected
  • 5.8.0affected
  • 5.5.2affected

Cisco Cisco Open Source Snort3

Default version status: unknown

  • 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
  • 3.1.28.0affected
  • 3.1.29.0affected
  • 3.1.30.0affected
  • 3.1.31.0affected
  • 3.1.32.0affected
  • 3.1.36.0affected
  • 3.1.38.0affected
  • 3.1.39.0affected
  • 3.1.40.0affected
  • 3.1.41.0affected
  • 3.1.42.0affected
  • 3.1.43.0affected
  • 3.1.45.0affected
  • 3.1.47.0affected
  • 3.1.48.0affected
  • 3.1.50.0affected
  • 3.1.51.0affected
  • 3.1.52.0affected
  • 3.1.53.0affected
  • 3.1.55.0affected
  • 3.1.56.0affected
  • 3.1.57.0affected
  • 3.1.58.0affected
  • 3.1.59.0affected
  • 3.1.60.0affected
  • 3.1.61.0affected
  • 3.1.62.0affected
  • 3.1.63.0affected
  • 3.1.64.0affected
  • 3.1.65.0affected
  • 3.1.66.0affected
  • 3.1.67.0affected
  • 3.1.69.0affected
  • 3.1.70.0affected
  • 3.1.71.0affected
  • 3.1.72.0affected
  • 3.1.73.0affected
  • 3.1.74.0affected
  • 3.1.75.0affected
  • 3.1.76.0affected
  • 3.1.77.0affected
  • 3.1.78.0affected
  • 3.1.81.0affected
  • 3.1.82.0affected
  • 3.1.83.0affected
  • 3.1.84.0affected
  • 3.2.1.0affected
  • 3.2.2.0affected
  • 3.3.0.0affected
  • 3.3.1.0affected
  • 3.3.2.0affected
  • 3.3.3.0affected
  • 3.3.4.0affected
  • 3.3.5.0affected
  • 3.3.7.0affected
  • 3.5.0.0affected
  • 3.5.1.0affected
  • 3.8.1.0affected
  • 3.6.0.0affected
  • 3.6.2.0affected
  • 3.9.3.0affected
  • 3.7.2.0affected
  • 3.7.0.0affected
  • 3.9.6.0affected
  • 3.10.0.0affected
  • 3.10.2.0affected
  • 3.7.4.0affected
  • 3.9.0.0affected
  • 3.5.2.0affected
  • 3.12.1.0affected
  • 3.6.1.0affected
  • 3.9.2.0affected
  • 3.6.3.0affected
  • 3.9.5.0affected
  • 3.7.1.0affected
  • 3.9.7.0affected
  • 3.7.3.0affected
  • 3.10.1.0affected
  • 3.9.1.0affected
  • 3.11.1.0affected

Cisco Cisco Secure Firewall Threat Defense (FTD) Software

Default version status: unknown

  • 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
  • 7.2.6affected
  • 7.0.6.2affected
  • 7.4.1.1affected
  • 7.2.7affected
  • 7.2.5.2affected
  • 7.3.1.2affected
  • 7.2.8affected
  • 7.6.0affected
  • 7.4.2affected
  • 7.2.8.1affected
  • 7.0.6.3affected
  • 7.4.2.1affected
  • 7.2.9affected
  • 7.0.7affected
  • 7.7.0affected
  • 7.4.2.2affected
  • 7.2.10affected
  • 7.6.1affected
  • 7.4.2.3affected
  • 7.0.8affected
  • 7.6.2affected
  • 7.7.10affected
  • 7.7.11affected
  • 7.0.8.1affected
  • 7.6.2.1affected
  • 7.7.10.1affected
  • 7.4.2.4affected
  • 7.2.10.2affected
  • 7.4.3affected
  • 7.6.4affected
  • 10.0.0affected
  • 7.4.4affected
  • 7.0.9affected
  • 7.2.11affected
  • 7.4.7affected

Cisco Cisco UTD SNORT IPS Engine Software

Default version status: unknown

  • 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
  • 17.12.5daffected
  • 17.18.2affected
  • 26.1.1affected
  • 17.15.5affected
  • 17.15.5aaffected
  • 17.12.7affected
  • 17.12.7aaffected
  • 17.12.7baffected
  • 17.18.3aaffected
  • 17.12.8affected
  • 17.15.6affected
  • 17.18.4affected
  • 26.1.2affected

References