CVE-2003-0138

HIGHCVSS v2 · 7.57.5—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 7.5 — v2 rates that HIGH (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:L/Au:N/C:P/I:P/A:P. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 4.3% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 4%CVSS v2: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

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 v2.0 (legacy)
7.5HIGHNVD never assigned a CVSS v3 rating to this CVE
EG Score
7.5(low)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation4% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
4%
EPSS %ILE
91%
KEV
Not listed

Published

March 24, 2003

Last Modified

June 16, 2026

References (24)

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatpatch2003-04-29redhat
redhatpatch2003-04-02redhat
redhatpatch2003-03-27redhat
redhatpatch2003-03-26redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(11 across 5 ecosystems)
Debian:3.0(3)
PackageVulnerable rangeFixed inDependents
heimdal0.2l-7, 0.2l-7.6, 0.4e-7.woody.10.4e-7.woody.8—
krb40.9.9-2 ... 1.1-8-2 (7 versions)1.1-8-2.3—
krb5—1.2.4-5woody4—
Debian:11(2)
PackageVulnerable rangeFixed inDependents
heimdal—0.5.2-1—
krb5—1.2.7-3—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
heimdal—0.5.2-1—
krb5—1.2.7-3—
Debian:13(2)
PackageVulnerable rangeFixed inDependents
heimdal—0.5.2-1—
krb5—1.2.7-3—
Debian:14(2)
PackageVulnerable rangeFixed inDependents
heimdal—0.5.2-1—
krb5—1.2.7-3—

All Vendor Advisories

(4)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 0× in last 7d / 5× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-16 05:27 UTCOSV refresh
  2. 2026-09-12 14:54 UTCEPSS rescore
  3. 2026-09-10 09:23 UTCEPSS rescore
  4. 2026-08-30 01:13 UTCEPSS rescore
  5. 2026-08-28 03:47 UTCOSV refresh
  6. 2026-08-11 17:32 UTCOSV refresh
  7. 2026-07-26 17:47 UTCOSV refresh
  8. 2026-07-26 13:23 UTCEG score recompute▲ 7.50
  9. 2026-07-25 14:11 UTCEPSS rescore
  10. 2026-07-24 14:11 UTCEPSS rescore
  11. 2026-07-23 00:45 UTCEG score recompute
  12. 2026-07-23 00:26 UTCEG score recompute
  13. 2026-07-22 23:49 UTCEG score recompute
  14. 2026-07-22 21:29 UTCEG score recompute
  15. 2026-07-20 17:02 UTCEPSS rescore
  16. 2026-07-19 14:25 UTCEPSS rescore
  17. 2026-07-18 09:59 UTCEPSS rescore
  18. 2026-07-18 09:59 UTCEPSS rescore
  19. 2026-07-16 16:58 UTCEPSS rescore
  20. 2026-07-15 01:55 UTCEPSS rescore
  21. 2026-07-15 01:55 UTCEPSS rescore
  22. 2026-07-11 08:22 UTCEPSS rescore
  23. 2026-07-11 08:22 UTCEPSS rescore
  24. 2026-07-09 11:46 UTCOSV refresh
  25. 2026-07-08 15:09 UTCEPSS rescore
Show 63 more
  1. 2026-07-06 02:19 UTCEPSS rescore
  2. 2026-07-04 06:26 UTCEPSS rescore
  3. 2026-07-02 14:00 UTCEPSS rescore
  4. 2026-06-29 14:02 UTCEPSS rescore
  5. 2026-06-29 14:02 UTCEPSS rescore
  6. 2026-06-28 14:02 UTCEPSS rescore
  7. 2026-06-28 04:52 UTCEPSS rescore
  8. 2026-06-27 03:04 UTCEPSS rescore
  9. 2026-06-23 21:29 UTCEPSS rescore
  10. 2026-06-22 14:22 UTCEPSS rescore
  11. 2026-06-21 14:52 UTCEPSS rescore
  12. 2026-06-21 01:56 UTCEPSS rescore
  13. 2026-06-21 00:12 UTCOSV refresh
  14. 2026-06-19 19:22 UTCEPSS rescore
  15. 2026-06-19 19:22 UTCEPSS rescore
  16. 2026-06-18 17:49 UTCEPSS rescore
  17. 2026-06-18 17:49 UTCEPSS rescore
  18. 2026-06-17 17:49 UTCEPSS rescore
  19. 2026-06-17 17:49 UTCEPSS rescore
  20. 2026-06-16 17:49 UTCEPSS rescore
  21. 2026-06-16 17:49 UTCEPSS rescore
  22. 2026-06-15 17:43 UTCEPSS rescore
  23. 2026-06-13 22:56 UTCEPSS rescore
  24. 2026-06-12 23:08 UTCEPSS rescore
  25. 2026-06-11 13:55 UTCEPSS rescore
  26. 2026-06-10 22:13 UTCEPSS rescore
  27. 2026-06-10 13:17 UTCEPSS rescore
  28. 2026-06-08 14:13 UTCEPSS rescore
  29. 2026-06-07 15:21 UTCEPSS rescore
  30. 2026-06-06 13:44 UTCEPSS rescore
  31. 2026-06-06 13:44 UTCEPSS rescore
  32. 2026-06-06 13:44 UTCEPSS rescore
  33. 2026-06-05 22:43 UTCEPSS rescore
  34. 2026-06-05 22:43 UTCEPSS rescore
  35. 2026-06-05 06:07 UTCEPSS rescore
  36. 2026-06-04 13:09 UTCEPSS rescore
  37. 2026-06-02 20:10 UTCEPSS rescore
  38. 2026-06-01 13:49 UTCEPSS rescore
  39. 2026-06-01 13:49 UTCEPSS rescore
  40. 2026-05-31 22:28 UTCEPSS rescore
  41. 2026-05-31 17:49 UTCEG score recompute
  42. 2026-05-31 17:49 UTCVendor advisory
  43. 2026-05-31 17:49 UTCGHSA enrichment
  44. 2026-05-31 00:13 UTCEPSS rescore
  45. 2026-05-31 00:13 UTCEPSS rescore
  46. 2026-05-29 13:40 UTCEPSS rescore
  47. 2026-05-29 13:40 UTCEPSS rescore
  48. 2026-05-28 13:42 UTCEPSS rescore
  49. 2026-05-28 13:42 UTCEPSS rescore
  50. 2026-05-28 13:42 UTCEPSS rescore
  51. 2026-05-27 13:37 UTCEPSS rescore
  52. 2026-05-26 13:41 UTCEPSS rescore
  53. 2026-05-26 13:41 UTCEPSS rescore
  54. 2026-05-26 07:16 UTCEPSS rescore
  55. 2026-05-26 07:16 UTCEPSS rescore
  56. 2026-05-24 16:42 UTCEPSS rescore
  57. 2026-05-22 21:15 UTCEPSS rescore
  58. 2026-05-22 09:07 UTCOSV refresh
  59. 2026-05-20 22:36 UTCEPSS rescore
  60. 2026-05-20 11:20 UTCEPSS rescore
  61. 2026-05-20 11:20 UTCEPSS rescore
  62. 2026-05-18 21:29 UTCEPSS rescore
  63. 2026-05-18 21:29 UTCEPSS rescore

Related CVEs(same product + same vendor)

Frequently asked(4)

What is CVE-2003-0138?
CVE-2003-0138 is a high vulnerability published on March 24, 2003. 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.
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 June 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 4% probability of exploitation in the next 30 days, which ranks it in the top 9.3% of all scored CVEs.
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.

Dependency Blast Radius

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