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
Trending — 4 sources updated this week
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
49%
KEV
Not listed

Published

June 19, 2026

Last Modified

July 28, 2026

Advisory Details (1)

Auto-updated Jul 31, 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 77× in last 7d / 257× 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 449 total refreshes for this CVE.

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

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 July 28, 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 50.8% 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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