CVE-2025-20360

Multiple Cisco Products Snort 3 MIME Denial of Service Vulnerability

MEDIUM
5.8
CVSS Score
Published: October 15, 2025 at 04:19 PM UTC
Updated: October 18, 2026 at 09:10 PM UTC
2 products affected across 1 vendorSecure Firewall Threat DefenseCisco Cyber Vision

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Severity
MEDIUM5.8
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

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.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.8MEDIUMcisco
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-805

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