Denial-of-Service Vulnerability in Cisco Snort 3 Detection Engine
CVE-2026-20065

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-2026-20065?

Cisco's Snort 3 Detection Engine is vulnerable due to an issue in the binder module initialization logic, which can be exploited by an unauthenticated remote attacker. By sending specific packets through existing connections monitored by Snort 3, an attacker can cause the engine to restart unexpectedly. This interruption can lead to a denial-of-service condition, affecting the system's ability to perform packet inspection effectively.

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Affected Version(s)

Cisco Secure Firewall Threat Defense (FTD) Software 7.0.0

Cisco Secure Firewall Threat Defense (FTD) Software 7.0.0.1

Cisco Secure Firewall Threat Defense (FTD) Software 7.0.1

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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