No exploitation reportedFix available

CVE-2004-0434

Q: Is CVE-2004-0434 actively exploited?

Active exploitation of CVE-2004-0434 has not been confirmed. Its EPSS score was 7.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2004-0434?

CVE-2004-0434 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.

Published2004-07-07
WeaknessCWE-131

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

k5admind (kadmind) for Heimdal allows remote attackers to execute arbitrary code via a Kerberos 4 compatibility administration request whose framing length is less than 2, which leads to a heap-based buffer overflow.

Timeline

dates in UTC

2004-07-0704:00CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 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-2004-0434?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2004-0434?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Debian debian linux

Branch	Affected	Fixed in	Source
3.0	= 3.0	no fix published	NVD

Heimdal project heimdal

Branch	Affected	Fixed in	Source
0.6	< 0.6.2	0.6.2	NVD

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

Fix

Advisories and patches

www.debian.orgPatch

Detection

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

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.010read 2026-10-23
NVDweakness (CWE)CWE-131read 2026-10-23
FIRST EPSSEPSS score7.2 %2026-10-23

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: 2004-07-07
Last Modified: 2026-06-16
NVD status: Modified

Frequently asked questions

What is CVE-2004-0434?

Is CVE-2004-0434 actively exploited?

Active exploitation of CVE-2004-0434 has not been confirmed. Its EPSS score was 7.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2004-0434?

CVE-2004-0434 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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