CVE-2023-21529

HIGH8.8

CISA KEV

Published 2023-02-14 · Updated 2026-08-19 · Source secure@microsoft.com

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

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

CWE-502

CISA Known-Exploited Vulnerability

Product: Microsoft — Exchange Server

Name: Microsoft Exchange Server Deserialization of Untrusted Data Vulnerability

Date added: 2026-04-13 · Due: 2026-04-27

USED IN RANSOMWARE

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

References

View on NVD

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