Denial of Service Vulnerability in Cisco Snort 3 Detection Engine
CVE-2026-20058

5.8MEDIUM

Key Information:

Vendor

Cisco
Status
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-2026-20058?

The Cisco Snort 3 Detection Engine is susceptible to vulnerabilities stemming from improper error checking during the decompression of VBA data. An unauthenticated, remote attacker can exploit this flaw by sending specially crafted VBA data to the Snort 3 Detection Engine. A successful attack may result in unexpected restarts of the engine, leading to a Denial of Service condition, impacting the availability of services reliant on the affected device.

Affected Version(s)

Cisco Secure Firewall Threat Defense (FTD) Software 7.2.0

Cisco Secure Firewall Threat Defense (FTD) Software 7.2.0.1

Cisco Secure Firewall Threat Defense (FTD) Software 7.2.1

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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