CVE-2026-41090

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

Score 9.3 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-26. the CNA's CVSS baseline 9.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
9.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.3Exploit: NoneExposed: 0

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

Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to perform tampering over a network.

CVSS v3
9.3
EG Score
9.3(medium)
EPSS
34.0%
KEV
Not listed

Published

May 26, 2026

Last Modified

June 19, 2026

Advisory Details (1)

Auto-updated May 28, 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-2026-41090

Vendor Advisories for CVE-2026-41090(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 8× in last 7d / 124× 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 393 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-41090?
CVE-2026-41090 is a critical vulnerability published on May 26, 2026. Improper neutralization of special elements used in a command ('command injection') in Microsoft Copilot allows an unauthorized attacker to perform tampering over a network.
When was CVE-2026-41090 disclosed?
CVE-2026-41090 was first published in the National Vulnerability Database on May 26, 2026, with the most recent update on June 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41090 actively exploited?
CVE-2026-41090 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-41090?
CVE-2026-41090 has a CVSS v4.0 base score of 9.3 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-41090?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41090, 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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