CVE-2026-69641

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-08. the CNA's CVSS baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: None knownExposed: 0

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

Missing authorization in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity91% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
57%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 24, 2026

Advisory Details (1)

Auto-updated Sep 15, 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-2026-69641

Vendor Advisories for CVE-2026-69641(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 96× in last 7d / 234× 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 234 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-69641?
CVE-2026-69641 is a critical vulnerability published on September 8, 2026. Missing authorization in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
When was CVE-2026-69641 disclosed?
CVE-2026-69641 was first published in the National Vulnerability Database on September 8, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-69641 actively exploited?
CVE-2026-69641 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 43.2% of all scored CVEs.
What is the CVSS score of CVE-2026-69641?
CVE-2026-69641 has a CVSS v4.0 base score of 9.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-69641?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-69641, 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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