Denial of Service Vulnerability in Cisco Snort 3 Detection Engine
CVE-2026-20068

5.8MEDIUM

Key Information:

Vendor

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

Badges

👾 Exploit Exists

What is CVE-2026-20068?

A vulnerability exists in the Snort 3 detection engine used by multiple Cisco products, which can lead to a Denial of Service (DoS). The issue stems from incomplete error handling during the parsing of remote procedure call (RPC) data. An unauthenticated attacker can exploit this flaw by sending specifically crafted RPC packets to the Snort 3 Detection Engine over an established connection. A successful attack may result in the engine unexpectedly restarting, leading to an interruption in its packet inspection capabilities, and potentially exposing the network to further threats.

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Affected Version(s)

Cisco Cyber Vision 3.0.0

Cisco Cyber Vision 3.0.2

Cisco Cyber Vision 3.0.3

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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