cisco-sa-snort3-multi-dos-XFWkWSwzMediumCVSS 5.8

Multiple Cisco Products Snort 3 Denial of Service Vulnerabilities

Published
March 4, 2026
Last Modified
March 4, 2026

🔗 CVE IDs covered (5)

CVE-2026-20005 →CVE-2026-20065 →CVE-2026-20066 →CVE-2026-20067 →CVE-2026-20068 →

📋 Description

Multiple Cisco products are affected by vulnerabilities in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.

For more information about these vulnerabilities, see the Details ["#details"] section of this advisory.

Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.

This advisory is part of the March 2026 release of the Cisco Secure Firewall ASA, Secure FMC, and Secure FTD Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: March 2026 Semiannual Cisco Secure Firewall ASA, Secure FMC, and Secure FTD Software Security Advisory Bundled Publication ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-75736"].

CVE-2026-20065 — Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability (CVSS 3.1 5.8, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L) CVE-2026-20067 — Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability (CVSS 3.1 5.8, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L) CVE-2026-20068 — Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability (CVSS 3.1 5.8, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L) CVE-2026-20066 — Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability (CVSS 3.1 5.8, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L) CVE-2026-20005 — Multiple Cisco Products Snort 3 SSL Denial of Service Vulnerability (CVSS 3.1 5.8, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L)

🎯 Affected products289

  • Cisco 3000 Series Industrial Security Appliances (ISA)
  • Cisco ASA 5500-X Series Firewalls
  • Cisco Cyber Vision
  • Cisco Firepower 1000 Series
  • Cisco Firepower 2100 Series
  • Cisco Firepower 4100 Series
  • Cisco Firepower 9000 Series
  • Cisco Open Source Snort3
  • Cisco Secure Firewall 1200 Series
  • Cisco Secure Firewall 3100 Series
  • Cisco Secure Firewall 4200 Series
  • Cisco Secure Firewall Threat Defense (FTD) Software
  • Cisco Secure Firewall Threat Defense Virtual
  • Cisco UTD SNORT IPS Engine Software
  • Cisco Cyber Vision 3.0.0
  • Cisco Cyber Vision 3.0.1
  • Cisco Cyber Vision 3.0.2
  • Cisco Cyber Vision 3.0.3
  • Cisco Cyber Vision 3.0.4
  • Cisco Cyber Vision 3.0.5
  • Cisco Cyber Vision 3.0.6
  • Cisco Cyber Vision 3.1.0
  • Cisco Cyber Vision 3.1.1
  • Cisco Cyber Vision 3.1.2
  • Cisco Cyber Vision 3.2.0
  • Cisco Cyber Vision 3.2.1
  • Cisco Cyber Vision 3.2.2
  • Cisco Cyber Vision 3.2.3
  • Cisco Cyber Vision 3.2.4
  • Cisco Cyber Vision 4.0.0
  • +259 more not shown

✅ Remediation

Cisco has released software updates that address this vulnerability. https://software.cisco.com Workarounds: There are no workarounds that address these vulnerabilities.

🔗 References (22)