CVE-2025-54574

CRITICAL
2025-08-01 [email protected]
9.3
CVSS 3.1
Share

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 28, 2026 - 19:04 vuln.today
Patch Released
Mar 28, 2026 - 19:04 nvd
Patch available
CVE Published
Aug 01, 2025 - 18:15 nvd
CRITICAL 9.3

Tags

Heap Overflow Buffer Overflow RCE Squid Redhat Suse

Description

Squid is a caching proxy for the Web. In versions 6.3 and below, Squid is vulnerable to a heap buffer overflow and possible remote code execution attack when processing URN due to incorrect buffer management. This has been fixed in version 6.4. To work around this issue, disable URN access permissions.

Analysis

Squid is a caching proxy for the Web. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

Technical Context

This vulnerability is classified under CWE-122. Squid is a caching proxy for the Web. In versions 6.3 and below, Squid is vulnerable to a heap buffer overflow and possible remote code execution attack when processing URN due to incorrect buffer management. This has been fixed in version 6.4. To work around this issue, disable URN access permissions. Affected products include: Squid-Cache Squid. Version information: version 6.4..

Affected Products

Squid-Cache Squid.

Remediation

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Priority Score

49
Low Medium High Critical
KEV: 0
EPSS: +3.0
CVSS: +46
POC: 0

Vendor Status

Share

CVE-2025-54574 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy