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Home/Vulnerability/CVE-2025-54574

CVE-2025-54574

Squid's URN Handling can lead to Buffer Overflow

Published: Aug 1, 2025Updated: Nov 5, 2025 Sources: CVE List NVD BDU
NVD MITRE
9.3CVSS
CRITICAL

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.

EPSS Score
19.9%
Top 4.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:NI:LA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:HAvailability
High

Weaknesses

CWE-122CWE-787

Affected Products

squid
squid-cache
Networking Infrastructure / load-balancer-proxy
РЕД ОС
ООО «Ред Софт»
Operating Systems / linux-distro
Astra Linux Special Edition
ООО «РусБИТех-Астра»
Operating Systems / linux-distro
Squid
Squid Software Foundation
Networking Infrastructure / load-balancer-proxy
squid-cacheoss-projectNetworking Infrastructureaka squid, squid cache
ооо «ред софт»commercialRUOperating Systemsaka red soft
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
squid software foundationoss-projectNetworking Infrastructure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://github.com/squid-cache/squid/security/advisories/GHSA-w4gv-vw3f-29g3
github.com
https://github.com/squid-cache/squid/commit/a27bf4b84da23594150c7a86a23435df0b35b988
github.com
https://github.com/squid-cache/squid/releases/tag/SQUID_6_4
github.com
and 6 more references View all →

Timeline

Published
Aug 1, 2025
Last Updated
Nov 5, 2025
News mentions
1

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