PT-2026-23023 · Cisco · Cisco Snort 3 Detection Engine

Published 2026-03-04 · Updated 2026-03-04 · CVE-2026-20065

Positive Technologies (AI Summary)

CVSS v3.1

5.8

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Cisco Snort 3 Detection Engine (affected versions not specified)

Description A flaw exists in the Snort 3 Detection Engine’s binder module initialization logic. An unauthenticated, remote attacker can exploit this by sending specific packets through an established connection parsed by Snort 3. Successful exploitation may lead to a denial-of-service (DoS) condition as the Snort 3 Detection Engine unexpectedly restarts, interrupting packet inspection.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

CVE-2026-20065

Affected Products

Cisco Snort 3 Detection Engine

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-20065 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz · Vendor Advisory
• https://twitter.com/CVEnew/status/2029272787542532191 · Twitter Post