CVE-2025-54574
9.8
CRITICAL
CVSS 3.1
EPSS 9.3%
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.
How to fix CVE-2025-54574
To remediate CVE-2025-54574, upgrade the affected package to a fixed version below.
- Debian/squid—upgrade to 4.13-10+deb11u5 or later
Is CVE-2025-54574 being exploited?
Moderate — EPSS is 9.3%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (1)
- from 0, < 4.13-10+deb11u5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |