CVE-2026-61939

HIGHPre-NVD 7.07.0—
EchelonGraph scoreMEDIUM confidence

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2026-08-11. The CNA's CVSS baseline 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
7.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Use after free in Winlogon allows an authorized attacker to elevate privileges locally.

CVSS v3
7.0
EG Score
7.0HIGHmedium confidence
EG Risk
32
EG Risk 32/100CISA 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
Severity70% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
16th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). 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

August 11, 2026

Last Modified

September 29, 2026

Advisory Details (1)

Auto-updated Aug 11, 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-2026-61939

Vendor Advisories for CVE-2026-61939(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 27× in last 7d / 151× 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 382 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-61939?
CVE-2026-61939 is a high vulnerability published on August 11, 2026. Use after free in Winlogon allows an authorized attacker to elevate privileges locally.
When was CVE-2026-61939 disclosed?
CVE-2026-61939 was first published on August 11, 2026, with the most recent update on September 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-61939 actively exploited?
CVE-2026-61939 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-61939?
CVE-2026-61939 has a CVSS base score of 7.0 (the CNA's own assessment, by microsoft; NVD's own analysis pending).
How do I remediate CVE-2026-61939?
A fix for CVE-2026-61939 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-61939 are linked in the Vendor Advisories panel on this page.

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