Denial of Service Vulnerability in Cisco Snort 3 Detection Engine
CVE-2026-20005

5.8MEDIUM

Key Information:

Vendor

Cisco
Status
Cisco Secure Firewall Threat Defense (ftd) Software
Cisco Cyber Vision
Cisco Utd Snort Ips Engine Software
Vendor
CVE Published:
4 March 2026

Badges

👾 Exploit Exists

What is CVE-2026-20005?

A vulnerability exists in Cisco's Snort 3 Detection Engine, allowing unauthenticated remote attackers to disrupt packet inspection by exploiting incomplete parsing of SSL handshake ingress packets. By sending specially crafted SSL handshake packets, an attacker can induce unexpected restarts of the Snort 3 Detection Engine, leading to a denial of service condition that affects network security and performance.

Affected Version(s)

Cisco Cyber Vision 3.0.4

Cisco Cyber Vision 3.0.0

Cisco Cyber Vision 3.0.1

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
5.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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