CVE-2024-21410

CRITICAL9.8

CISA KEV

Published 2024-02-13 · Updated 2026-06-17 · Source secure@microsoft.com

Summary

CVE-2024-21410 is a critical-severity (CVSS 9.8) vulnerability in Microsoft Exchange Server. CISA added it to the Known Exploited Vulnerabilities catalog on February 15, 2024, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by March 7, 2024. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

All 390 known-exploited Microsoft vulnerabilities →

Description

Microsoft Exchange Server Elevation of Privilege Vulnerability

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

CWE-287

CISA Known-Exploited Vulnerability

Product: Microsoft — Exchange Server

Name: Microsoft Exchange Server Privilege Escalation Vulnerability

Date added: 2024-02-15 · Due: 2024-03-07

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

References

View on NVD

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