Remote Code Execution Risk in Cisco Snort 3 Detection Engine
CVE-2026-20054

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-2026-20054?

A vulnerability exists in Cisco's Snort 3 Detection Engine related to improper error handling during the decompression of VBA data. An unauthenticated remote attacker could exploit this weakness by sending specially crafted VBA data to the engine, leading to a potential infinite loop scenario. This could render the Snort 3 Detection Engine unresponsive, effectively causing a Denial of Service (DoS) on the targeted device, thus impacting its ability to perform network security functions.

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

.