When was CVE-2003-0138 disclosed?

CVE-2003-0138 was first published in the National Vulnerability Database on March 24, 2003, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2003-0138 actively exploited?

CVE-2003-0138 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2003-0138?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2003-0138, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

CVE-2003-0138

NONECVSS 0.0

0.0

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.

CVSS v3: —
EG Score: —
EPSS: 90.5%
KEV: Not listed

References (24)

cve@mitrehttp://marc.info/?l=bugtraq&m=104791775804776&w=2
cve@mitrehttp://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2003-004-krb4.txt
cve@mitrehttp://www.debian.org/security/2003/dsa-266
cve@mitrehttp://www.debian.org/security/2003/dsa-269
cve@mitrehttp://www.debian.org/security/2003/dsa-273
cve@mitrehttp://www.kb.cert.org/vuls/id/623217
cve@mitrehttp://www.redhat.com/support/errata/RHSA-2003-051.html
cve@mitrehttp://www.redhat.com/support/errata/RHSA-2003-052.html
cve@mitrehttp://www.redhat.com/support/errata/RHSA-2003-091.html
cve@mitrehttp://www.securityfocus.com/archive/1/316960/30/25250/threaded
cve@mitrehttp://www.securityfocus.com/bid/7113
cve@mitrehttps://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A248
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=bugtraq&m=104791775804776&w=2
af854a3a-2127-422b-91ae-364da2661108http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2003-004-krb4.txt
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2003/dsa-266

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CVE-2003-0138

Published

Last Modified

References (24)

Data Freshness Timeline

Frequently asked(4)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2003-0138?

CVE-2003-0138

📅 Published

🔄 Last Modified

🔗 References (24)

Data Freshness Timeline

❓ Frequently asked(4)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2003-0138?

Published

Last Modified

References (24)

Frequently asked(4)