CVE-2024-21410

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2024-02-15), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 5 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 13%CVSS: 9.8Exploit: cisa kev · ssvc active · epss top5pctExposed: 0

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

Microsoft Exchange Server Elevation of Privilege Vulnerability

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

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
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
13%
EPSS %ILE
96%
KEV
⚠ Exploited

Published

February 13, 2024

Last Modified

October 28, 2025

Advisory Details (2)

Auto-updated Jul 28, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa, microsoft.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21410
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-2024-21410

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 71× in last 7d / 360× 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 781 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2024-21410?
CVE-2024-21410 is a critical vulnerability published on February 13, 2024. Microsoft Exchange Server Elevation of Privilege Vulnerability
When was CVE-2024-21410 disclosed?
CVE-2024-21410 was first published in the National Vulnerability Database on February 13, 2024, with the most recent update on October 28, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-21410 actively exploited?
Yes. CISA added CVE-2024-21410 to the Known Exploited Vulnerabilities catalog on February 15, 2024, affecting Microsoft Exchange Server. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2024-21410?
CVE-2024-21410 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2024-21410?
CVE-2024-21410 affects Microsoft Exchange Server. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2024-21410?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-21410, 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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