PT-2025-42382 · Cisco · Cisco Snort 3

Published 2025-10-15 · Updated 2026-02-23 · CVE-2025-20360

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 (affected versions not specified)

Description A flaw exists in the Snort 3 HTTP Decoder that may allow a remote, unauthenticated attacker to disrupt service. The issue stems from insufficient error checking during the parsing of HTTP header MIME fields. By sending specially crafted HTTP packets, an attacker could cause the Snort 3 Detection Engine to restart, leading to a denial-of-service condition.

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

DoS

Weakness Enumeration

CWE-805

Related Identifiers

CVE-2025-20360

Affected Products

Cisco Snort 3

References · 7

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-mime-vulns-tTL8PgVH · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-20360 · Security Note
• https://t.me/CVEtracker/35026 · Telegram Post
• https://t.me/cveNotify/151863 · Telegram Post
• https://twitter.com/probablypwned/status/2025979258082906219 · Twitter Post
• https://twitter.com/CVEnew/status/1978545034749522179 · Twitter Post
• https://twitter.com/SystemTek_UK/status/1979276337513648231 · Twitter Post