What is the CVSS score of CVE-2026-20065?

CVE-2026-20065 has a CVSS 3.1 base score of 5.8 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L. EPSS exploitation probability: 0.1%.

Which versions of Cisco are affected by CVE-2026-20065?

CVE-2026-20065 presents moderate security risk rated CVSS 5.8. Exploitation could compromise the security of affected deployments.

How to fix or mitigate CVE-2026-20065?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Cisco CVE-2026-20065

MEDIUM

Improper Locking (CWE-667)

2026-03-04 psirt@cisco.com

Cisco Denial Of Service

5.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.8 MEDIUM

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:05 vuln.today

CVE Published

Mar 04, 2026 - 18:16 nvd

MEDIUM 5.8

DescriptionCVE.org

Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.

This vulnerability is due to an error in the binder module initialization logic of the Snort Detection Engine. An attacker could exploit this vulnerability by sending certain packets through an established connection that is parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine restarts unexpectedly.

AnalysisAI

Snort 3 Detection Engine in multiple Cisco products can be remotely restarted by unauthenticated attackers through crafted packets sent over established connections, due to improper binder module initialization logic. This denial-of-service vulnerability interrupts packet inspection capabilities and can be triggered without authentication or user interaction. No patch is currently available for this medium-severity flaw.

Technical ContextAI

Classified as CWE-667 (Improper Locking). Affects the binder component of Snort 3 Detection Engine. Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.