How severe is CVE-2004-2154?

CVE-2004-2154 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2004-2154 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-2154?

CVE-2004-2154 primarily affects Apple Cups. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2004-2154?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2004-2154 published?

CVE-2004-2154 was published on 2004-12-31 and last updated on 2026-06-16.

CVE-2004-2154

CVE-2004-2154 is a critical-severity vulnerability in Apple Cups with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-178.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-178
Affected product: Apple Cups
Published: 2004-12-31
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2004-2154?: 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.
How severe is CVE-2004-2154?: CVE-2004-2154 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2004-2154 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-2154?: CVE-2004-2154 primarily affects Apple Cups. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2004-2154?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2004-2154 published?: CVE-2004-2154 was published on 2004-12-31 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:apple:cups:*:*:*:*:*:*:*:*
cpe:2.3:a:apple:cups:1.1.21:-:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:4.10:*:*:*:*:*:*:*

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