CVE-2026-48582

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreMEDIUM 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
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.6Exploit: 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 Online allows an authorized attacker to elevate privileges over a network.

CVSS v3
9.6
EG Score
9.6(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity96% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
51%
KEV
Not listed

Published

June 19, 2026

Last Modified

August 25, 2026

Advisory Details (1)

Auto-updated Sep 3, 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 5× in last 7d / 149× 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 711 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 August 25, 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 1% probability of exploitation in the next 30 days, which ranks it in the top 49.3% of all scored CVEs.
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

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