Is CVE-2003-0138 in the CISA KEV catalog?

No. CVE-2003-0138 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2003-0138?

CVE-2003-0138 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2003-0138?

CVE-2003-0138 has an EPSS score of 4.28% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2003-0138?

Upgrade heimdal on debian 11 to 0.5.2-1 or later.

CVE & CISA-KEV Catalog

CVE-2003-0138

HIGHEPSS 90th pctl

7.5

CVSS v2

NVD

Description

Version 4 of the Kerberos protocol (krb4), as used in Heimdal and other packages, allows an attacker to impersonate any principal in a realm via a chosen-plaintext attack.

How to fix

Remediation Available

heimdalDebian

Fixed in:0.5.2-1CVE-2003-0138

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

4.28%probability of exploitation in 30 days

90thpercentile

Elevated risk: more likely to be exploited than 90% of all known CVEs.

References

Patch3

Other references9

Embed a live status badge for CVE-2003-0138

Markdown

[![CVE-2003-0138](https://tridentstack.com/cve/badge/CVE-2003-0138.svg)](https://tridentstack.com/cve/CVE-2003-0138)

HTML

<a href="https://tridentstack.com/cve/CVE-2003-0138"><img src="https://tridentstack.com/cve/badge/CVE-2003-0138.svg" alt="CVE-2003-0138"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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.