CVE-2026-65667

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreHIGH confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-07. the CNA's CVSS baseline 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 10.0Exploit: 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 Teams allows an unauthorized attacker to elevate privileges over a network.

CVSS v3
10.0
EG Score
10.0(high)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity100% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

August 6, 2026

Last Modified

August 20, 2026

Advisory Details (1)

Auto-updated Aug 20, 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-2026-65667

Vendor Advisories for CVE-2026-65667(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 125× in last 7d / 246× 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 246 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-65667?
CVE-2026-65667 is a critical vulnerability published on August 6, 2026. Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.
When was CVE-2026-65667 disclosed?
CVE-2026-65667 was first published in the National Vulnerability Database on August 6, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-65667 actively exploited?
CVE-2026-65667 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.0% of all scored CVEs.
What is the CVSS score of CVE-2026-65667?
CVE-2026-65667 has a CVSS v4.0 base score of 10.0 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-65667?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65667, 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

Explore the affected products and dependency analysis for CVE-2026-65667

Explore →

Is Your Infrastructure Affected by CVE-2026-65667?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs