CVE-2026-42989

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 7.8Exploit: None knownExposed: 0

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

Improper link resolution before file access ('link following') in Winlogon allows an authorized attacker to elevate privileges locally.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
36(Track)
EG Risk 36/100SSVC: 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
Severity78% × 45%
Exploitation2% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
81%
KEV
Not listed

Published

June 9, 2026

Last Modified

July 28, 2026

Advisory Details (1)

Auto-updated Jun 9, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42989

Vendor Advisories for CVE-2026-42989(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 102× 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.

Showing the most recent 100 of 194 total refreshes for this CVE.

  1. 2026-07-28 22:51 UTCEG score recompute
  2. 2026-07-28 22:51 UTCVendor advisory
  3. 2026-07-28 22:51 UTCGHSA enrichment
  4. 2026-07-28 15:36 UTCEPSS rescore
  5. 2026-07-28 02:40 UTCEG score recompute
  6. 2026-07-28 02:40 UTCVendor advisory
  7. 2026-07-28 02:40 UTCGHSA enrichment
  8. 2026-07-27 14:13 UTCEPSS rescore
  9. 2026-07-27 09:40 UTCVendor advisory
  10. 2026-07-27 09:40 UTCGHSA enrichment
  11. 2026-07-26 21:11 UTCEG score recompute
  12. 2026-07-26 21:11 UTCVendor advisory
  13. 2026-07-26 21:11 UTCGHSA enrichment
  14. 2026-07-26 14:54 UTCEPSS rescore
  15. 2026-07-26 14:54 UTCEPSS rescore
  16. 2026-07-26 05:57 UTCEG score recompute
  17. 2026-07-26 05:57 UTCVendor advisory
  18. 2026-07-26 05:57 UTCGHSA enrichment
  19. 2026-07-25 14:18 UTCEPSS rescore
  20. 2026-07-24 14:17 UTCEPSS rescore
  21. 2026-07-23 14:18 UTCEPSS rescore
  22. 2026-07-23 03:12 UTCEG score recompute
  23. 2026-07-22 14:08 UTCEPSS rescore
  24. 2026-07-21 15:24 UTCEPSS rescore
  25. 2026-07-20 17:08 UTCEPSS rescore
Show 75 more
  1. 2026-07-19 14:31 UTCEPSS rescore
  2. 2026-07-19 02:29 UTCEPSS rescore
  3. 2026-07-18 10:04 UTCEPSS rescore
  4. 2026-07-17 00:00 UTCVendor advisory
  5. 2026-07-16 23:59 UTCGHSA enrichment
  6. 2026-07-16 17:03 UTCEPSS rescore
  7. 2026-07-16 08:56 UTCVendor advisory
  8. 2026-07-16 08:56 UTCGHSA enrichment
  9. 2026-07-15 19:57 UTCVendor advisory
  10. 2026-07-15 19:57 UTCGHSA enrichment
  11. 2026-07-15 16:57 UTCEPSS rescore
  12. 2026-07-15 02:03 UTCGHSA enrichment
  13. 2026-07-15 02:00 UTCEPSS rescore
  14. 2026-07-14 12:24 UTCVendor advisory
  15. 2026-07-14 12:24 UTCGHSA enrichment
  16. 2026-07-13 22:30 UTCEPSS rescore
  17. 2026-07-13 20:25 UTCGHSA enrichment
  18. 2026-07-13 06:13 UTCEPSS rescore
  19. 2026-07-13 02:19 UTCVendor advisory
  20. 2026-07-13 02:19 UTCGHSA enrichment
  21. 2026-07-12 09:36 UTCVendor advisory
  22. 2026-07-12 09:36 UTCGHSA enrichment
  23. 2026-07-12 05:46 UTCEPSS rescore
  24. 2026-07-11 20:56 UTCVendor advisory
  25. 2026-07-11 20:56 UTCGHSA enrichment
  26. 2026-07-11 08:28 UTCVendor advisory
  27. 2026-07-11 08:28 UTCGHSA enrichment
  28. 2026-07-11 08:27 UTCEPSS rescore
  29. 2026-07-10 19:51 UTCVendor advisory
  30. 2026-07-10 19:51 UTCGHSA enrichment
  31. 2026-07-10 00:00 UTCVendor advisory
  32. 2026-07-09 23:59 UTCGHSA enrichment
  33. 2026-07-09 19:10 UTCEPSS rescore
  34. 2026-07-09 03:54 UTCVendor advisory
  35. 2026-07-09 03:54 UTCGHSA enrichment
  36. 2026-07-08 15:26 UTCVendor advisory
  37. 2026-07-08 15:26 UTCGHSA enrichment
  38. 2026-07-08 15:16 UTCEPSS rescore
  39. 2026-07-07 23:20 UTCVendor advisory
  40. 2026-07-07 23:20 UTCGHSA enrichment
  41. 2026-07-07 13:46 UTCEPSS rescore
  42. 2026-07-06 16:27 UTCEPSS rescore
  43. 2026-07-06 03:53 UTCVendor advisory
  44. 2026-07-06 03:53 UTCGHSA enrichment
  45. 2026-07-06 02:23 UTCEPSS rescore
  46. 2026-07-06 02:23 UTCEPSS rescore
  47. 2026-07-05 15:12 UTCVendor advisory
  48. 2026-07-05 15:12 UTCGHSA enrichment
  49. 2026-07-05 02:30 UTCEPSS rescore
  50. 2026-07-05 02:18 UTCVendor advisory
  51. 2026-07-05 02:18 UTCGHSA enrichment
  52. 2026-07-04 13:26 UTCVendor advisory
  53. 2026-07-04 13:26 UTCGHSA enrichment
  54. 2026-07-04 06:31 UTCEPSS rescore
  55. 2026-07-03 21:17 UTCVendor advisory
  56. 2026-07-03 21:16 UTCGHSA enrichment
  57. 2026-07-03 08:48 UTCVendor advisory
  58. 2026-07-03 08:48 UTCGHSA enrichment
  59. 2026-07-02 18:58 UTCVendor advisory
  60. 2026-07-02 18:58 UTCGHSA enrichment
  61. 2026-07-02 06:29 UTCVendor advisory
  62. 2026-07-02 06:28 UTCGHSA enrichment
  63. 2026-07-01 17:57 UTCVendor advisory
  64. 2026-07-01 17:57 UTCGHSA enrichment
  65. 2026-07-01 15:06 UTCEPSS rescore
  66. 2026-07-01 05:29 UTCVendor advisory
  67. 2026-07-01 05:29 UTCGHSA enrichment
  68. 2026-06-30 23:22 UTCEPSS rescore
  69. 2026-06-30 16:56 UTCVendor advisory
  70. 2026-06-30 16:55 UTCGHSA enrichment
  71. 2026-06-30 04:26 UTCVendor advisory
  72. 2026-06-30 04:26 UTCGHSA enrichment
  73. 2026-06-29 15:59 UTCVendor advisory
  74. 2026-06-29 15:59 UTCGHSA enrichment
  75. 2026-06-29 14:06 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-42989?
CVE-2026-42989 is a high vulnerability published on June 9, 2026. Improper link resolution before file access ('link following') in Winlogon allows an authorized attacker to elevate privileges locally.
When was CVE-2026-42989 disclosed?
CVE-2026-42989 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42989 actively exploited?
CVE-2026-42989 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 18.7% of all scored CVEs.
What is the CVSS score of CVE-2026-42989?
CVE-2026-42989 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-42989?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42989, 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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