CVE-2024-21410

CRITICAL severity · CVSS 9.8 · Improper authentication · actively exploited (CISA KEV)

9.8CVSS CRITICAL ● exploited

🔴 Actively exploited in the wild (CISA Known Exploited Vulnerabilities). Added to KEV 2024-02-15. US federal agencies must patch by 2024-03-07.

Summary

Microsoft Exchange Server Elevation of Privilege Vulnerability

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactHigh

Integrity impactHigh

Availability impactHigh

Exploit probability (EPSS)6%

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products we track (1)

Microsoft Exchange Server

Recommendation

This vulnerability is being actively exploited in the wild — patch affected products urgently. Open any affected product above for its exact safe version.

Official patch: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21410 ↗

Additional information

NVD record
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21410Patch
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21410Patch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21410