CVE-1999-1593

HIGHCVSS v2 · 7.67.6—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 7.6 — 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:H/Au:N/C:C/I:C/A:C. 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 18.1% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Triggered by: NVD CVSS v2.0 (legacy fallback)
Sources: epss, nvd_v2
Elevated
7.6EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 18%CVSS v2: 7.6Exploit: Elevated riskExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

Windows Internet Naming Service (WINS) allows remote attackers to cause a denial of service (connectivity loss) or steal credentials via a 1Ch registration that causes WINS to change the domain controller to point to a malicious server. NOTE: this problem may be limited when Windows 95/98 clients are used, or if the primary domain controller becomes unavailable.

CVSS v2.0 (legacy)
7.6HIGHNVD never assigned a CVSS v3 rating to this CVE
EG Score
7.6HIGHlow confidence
EG Risk
55
EG Risk 55/100CISA SSVC

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
Severity76% × 45%
Exploitation40% × 40%
Automatability30% × 15%
CISA SSVC: Track at low, Track or Track* at medium and Track* or Attend at high mission impact.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
18%
EPSS %ILE
97th
KEV
Not listed

CISA SSVCTrack at low, Track or Track* at medium and Track* or Attend at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

January 15, 2009

Last Modified

April 23, 2026

References (20)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 6× 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. 2026-10-09 19:58 UTCEPSS rescore
  2. 2026-10-08 16:26 UTCEPSS rescore
  3. 2026-10-07 23:35 UTCEPSS rescore
  4. 2026-10-06 15:07 UTCEPSS rescore
  5. 2026-10-04 23:14 UTCEPSS rescore
  6. 2026-09-29 02:30 UTCEG score recompute
  7. 2026-09-04 04:59 UTCEPSS rescore
  8. 2026-08-03 10:27 UTCEPSS rescore
  9. 2026-07-26 13:20 UTCEG score recompute▲ 7.60
  10. 2026-07-23 00:41 UTCEG score recompute
  11. 2026-07-23 00:24 UTCEG score recompute
  12. 2026-07-22 23:46 UTCEG score recompute
  13. 2026-07-22 21:26 UTCEG score recompute
  14. 2026-07-20 17:02 UTCEPSS rescore
  15. 2026-07-18 09:59 UTCEPSS rescore
  16. 2026-07-16 16:58 UTCEPSS rescore
  17. 2026-07-15 16:53 UTCEPSS rescore
  18. 2026-07-15 01:55 UTCEPSS rescore
  19. 2026-07-11 08:22 UTCEPSS rescore
  20. 2026-07-08 15:08 UTCEPSS rescore
  21. 2026-07-02 14:00 UTCEPSS rescore
  22. 2026-06-28 14:02 UTCEPSS rescore
  23. 2026-06-27 03:04 UTCEPSS rescore
  24. 2026-06-24 14:01 UTCEPSS rescore
  25. 2026-06-23 21:29 UTCEPSS rescore
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  1. 2026-06-22 14:22 UTCEPSS rescore
  2. 2026-06-21 01:56 UTCEPSS rescore
  3. 2026-06-19 19:22 UTCEPSS rescore
  4. 2026-06-18 17:49 UTCEPSS rescore
  5. 2026-06-18 17:49 UTCEPSS rescore
  6. 2026-06-17 17:49 UTCEPSS rescore
  7. 2026-06-16 17:49 UTCEPSS rescore
  8. 2026-06-14 23:13 UTCEPSS rescore
  9. 2026-06-13 22:56 UTCEPSS rescore
  10. 2026-06-12 23:07 UTCEPSS rescore
  11. 2026-06-11 13:55 UTCEPSS rescore
  12. 2026-06-10 22:13 UTCEPSS rescore
  13. 2026-06-10 13:17 UTCEPSS rescore
  14. 2026-06-07 15:21 UTCEPSS rescore
  15. 2026-06-05 06:07 UTCEPSS rescore
  16. 2026-06-04 13:09 UTCEPSS rescore
  17. 2026-06-02 20:10 UTCEPSS rescore
  18. 2026-06-01 13:48 UTCEPSS rescore
  19. 2026-05-31 22:27 UTCEPSS rescore
  20. 2026-05-31 00:13 UTCEPSS rescore
  21. 2026-05-31 00:13 UTCEPSS rescore
  22. 2026-05-30 18:45 UTCEG score recompute
  23. 2026-05-30 18:45 UTCGHSA enrichment
  24. 2026-05-29 13:40 UTCEPSS rescore
  25. 2026-05-28 13:42 UTCEPSS rescore
  26. 2026-05-28 13:42 UTCEPSS rescore
  27. 2026-05-28 13:42 UTCEPSS rescore
  28. 2026-05-28 13:42 UTCEPSS rescore
  29. 2026-05-27 13:37 UTCEPSS rescore
  30. 2026-05-27 13:37 UTCEPSS rescore
  31. 2026-05-26 07:16 UTCEPSS rescore
  32. 2026-05-26 07:16 UTCEPSS rescore
  33. 2026-05-24 16:42 UTCEPSS rescore
  34. 2026-05-22 21:15 UTCEPSS rescore
  35. 2026-05-21 22:38 UTCEPSS rescore
  36. 2026-05-20 22:36 UTCEPSS rescore
  37. 2026-05-20 11:20 UTCEPSS rescore
  38. 2026-05-20 11:20 UTCEPSS rescore
  39. 2026-05-18 21:29 UTCEPSS rescore
  40. 2026-05-18 21:29 UTCEPSS rescore

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Frequently asked(4)

What is CVE-1999-1593?
CVE-1999-1593 is a high vulnerability published on January 15, 2009. Windows Internet Naming Service (WINS) allows remote attackers to cause a denial of service (connectivity loss) or steal credentials via a 1Ch registration that causes WINS to change the domain controller to point to a malicious server. NOTE: this problem may be limited when Windows 95/98 clients…
When was CVE-1999-1593 disclosed?
CVE-1999-1593 was first published on January 15, 2009, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-1999-1593 actively exploited?
CVE-1999-1593 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 18% probability of exploitation in the next 30 days (97th percentile of EPSS-scored CVEs).
How do I remediate CVE-1999-1593?
No fix for CVE-1999-1593 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix.

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