No exploitation reportedFix available

CVE-2004-2154

Q: Is CVE-2004-2154 actively exploited?

Active exploitation of CVE-2004-2154 has not been confirmed. Its EPSS score was 2.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2004-2154?

CVE-2004-2154 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2004-12-31
Fixed in1.1.21
WeaknessCWE-178

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

CUPS before 1.1.21rc1 treats a Location directive in cupsd.conf as case sensitive, which allows attackers to bypass intended ACLs via a printer name containing uppercase or lowercase letters that are different from what is specified in the directive.

Timeline

dates in UTC

2004-12-3105:00CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2004-2154?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2004-2154?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · CISA-ADP

Apple cups

Branch	Affected	Fixed in	Source
1.1	< 1.1.21	1.1.21	NVD · CISA-ADP
1.1	= 1.1.21	no fix published	NVD

Canonical ubuntu linux

Branch	Affected	Fixed in	Source
4.10	= 4.10	no fix published	NVD · CISA-ADP

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Apple cups to 1.1.21

Advisories and patches

www.cups.orgPatch
bugzilla.redhat.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2024-07-16
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.19.82024-07-16
NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
CISA-ADPweakness (CWE)CWE-1782024-07-16
NVDweakness (CWE)CWE-178read 2026-10-23
FIRST EPSSEPSS score2.1 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2004-12-31
Last Modified: 2026-06-16
NVD status: Modified

Frequently asked questions

What is CVE-2004-2154?

Is CVE-2004-2154 actively exploited?

Active exploitation of CVE-2004-2154 has not been confirmed. Its EPSS score was 2.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2004-2154?

CVE-2004-2154 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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