Vulnerability Report

CVE-2025-54574

RCE

Title: Squid-Cache Squid RCE

Memory Corruption

Proof Of Concept

PoC Available for CVE-2025-54574

CWE Category CWE-787
Published Date Aug 01, 2025
Modified Date Nov 05, 2025
Exploit Status Available
Score 9.3 CVSS v3.1
Exploit Probability (EPSS)
22.92%

Vulnerability Summary

CVE-2025-54574: 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.

Impacted Vendors

S
squid 1
S
squid-cache 1

Reference Links

https://github.com/squid-cache/squid/commit/a27bf4b84da23594150c7a86a23435df0b35b988 https://github.com/squid-cache/squid/releases/tag/SQUID_6_4 https://github.com/squid-cache/squid/security/advisories/GHSA-w4gv-vw3f-29g3 http://www.openwall.com/lists/oss-security/2025/11/05/5 https://lists.debian.org/debian-lts-announce/2025/09/msg00027.html
CVSS v3.1
Source Entity [email protected]
Severity CRITICAL
9.3
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
CHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H
CVSS v3.1
Source Entity [email protected]
Severity CRITICAL
9.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2025-54574 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/Ashwesker/Blackash-CVE-2025-54574
View Code
GitHub https://github.com/starrynightsecurity/CVE-2025-54574-Squid-Heap-Buffer-Overflow
View Code
MODIFIED

Vulnerability data or affected products updated.

MODIFIED

Vulnerability data updated via NVD.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H

Affected Stack

No specific products linked.