CVE-2025-20360 MEDIUM

CVE-2025-20360: Multiple Cisco Products Snort 3 MIME Denial of Service Vulnerability

Vendor Cisco
Product Cisco Cyber Vision
Weakness CWE-805
Published October 15, 2025
Last update February 12, 2026

CVSS base score

5.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Multiple Cisco products are affected by a vulnerability in the Snort 3 HTTP Decoder that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart. This vulnerability is due to a lack of complete error checking when the MIME fields of the HTTP header are parsed. An attacker could exploit this vulnerability by sending crafted HTTP packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts.

Key dates

02Disclosure timeline

October 15, 2025 CVE published
February 12, 2026 Record updated