Is CVE-2004-2654 in the CISA KEV catalog?

No. CVE-2004-2654 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2004-2654?

CVE-2004-2654 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2004-2654?

CVE-2004-2654 has an EPSS score of 1.99% (78th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2004-2654?

Upgrade squid on debian 11 to 2.5.6 or later.

CVE & CISA-KEV Catalog

CVE-2004-2654

MEDIUMEPSS 78th pctl

5.0

CVSS v2

NVD

Description

The clientAbortBody function in client_side.c in Squid Web Proxy Cache before 2.6 STABLE6 allows remote attackers to cause a denial of service (segmentation fault) via unspecified vectors that trigger a null dereference. NOTE: in a followup advisory, a researcher claimed that the issue was a buffer overflow that was not fixed in STABLE6. However, the vendor's bug report clearly shows that the researcher later retracted this claim, because the tested product was actually STABLE5.

How to fix

Remediation Available

squidDebian

Fixed in:2.5.6CVE-2004-2654

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

1.99%probability of exploitation in 30 days

78thpercentile

Elevated risk: more likely to be exploited than 78% of all known CVEs.

References

Patch1

secunia.com

Vendor Advisory1

secunia.com

Other references5

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-16.