CVE-2026-48582

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreHIGH confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-19. the CNA's CVSS baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
9.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.6Exploit: NoneExposed: 0

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

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

CVSS v3
9.6
EG Score
9.6(high)
EPSS
31.0%
KEV
Not listed

Published

June 19, 2026

Last Modified

July 1, 2026

Advisory Details (1)

Auto-updated Jun 22, 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-2026-48582

Vendor Advisories for CVE-2026-48582(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 132× in last 7d / 331× 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 331 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-48582?
CVE-2026-48582 is a critical vulnerability published on June 19, 2026. Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
When was CVE-2026-48582 disclosed?
CVE-2026-48582 was first published in the National Vulnerability Database on June 19, 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-2026-48582 actively exploited?
CVE-2026-48582 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 31.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-48582?
CVE-2026-48582 has a CVSS v4.0 base score of 9.6 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-48582?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48582, 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-2026-48582

Explore →

Is Your Infrastructure Affected by CVE-2026-48582?

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

Start Free Scan →Browse All CVEs