Remote Code Execution Vulnerability in Cisco Snort 3 VBA Feature
CVE-2026-20053

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-2026-20053?

Cisco Snort 3 is impacted by a vulnerability related to its VBA feature, enabling unauthenticated remote attackers to disrupt the detection engine. This flaw arises from improper range checks during the decompression of user-controlled VBA data. By sending specially crafted data to the Snort 3 Detection Engine, an attacker may exploit this vulnerability, resulting in an overflow of heap data and potentially leading to a denial of service condition.

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

.