CVE-2023-21529

Published: Feb 14, 2023Modified: Jun 17, 2026CISA KEV

8.8

Vector

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

Exploitability: 2.8 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

Affected (4)

Products: Microsoft: Exchange Server

1 product

Exchange Server

Configuration A

4 vulnerable

Vulnerable Software	Affected Versions
Microsoft Exchange Server	Version 2013 cumulative_update_23
Microsoft Exchange Server	Version 2016 cumulative_update_23
Microsoft Exchange Server	Version 2019 cumulative_update_11
Microsoft Exchange Server	Version 2019 cumulative_update_12

Related CWEs

Deserialization of Untrusted Data

The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.

References (4)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529

Source: secure@microsoft.com

PatchVendor Advisory

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529

Source: af854a3a-2127-422b-91ae-364da2661108

PatchVendor Advisory

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21529

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

US Government Resource

https://www.microsoft.com/en-us/security/blog/2026/04/06/storm-1175-focuses-gaze-on-vulnerable-web-facing-assets-in-high-tempo-medusa-ransomware-operations/

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Technical Description

Timeline

No history available yet.