CVE-2026-54130

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-19. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

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

Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose information over a network.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
43.4%
KEV
Not listed

Published

June 18, 2026

Last Modified

July 1, 2026

Advisory Details (1)

Auto-updated Jul 4, 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-2026-54130

Vendor Advisories for CVE-2026-54130(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 136× in last 7d / 345× 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 345 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-54130?
CVE-2026-54130 is a critical vulnerability published on June 18, 2026. Missing authentication for critical function in M365 Copilot allows an unauthorized attacker to disclose information over a network.
When was CVE-2026-54130 disclosed?
CVE-2026-54130 was first published in the National Vulnerability Database on June 18, 2026, with the most recent update on July 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54130 actively exploited?
CVE-2026-54130 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 43.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-54130?
CVE-2026-54130 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-54130?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54130, 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-2026-54130

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