CVE-2023-21529

8.8 HIGH CISA KEV - Actively Exploited
Published: February 14, 2023 Modified: April 13, 2026
View on NVD

Description

Microsoft Exchange Server Remote Code Execution Vulnerability

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529
Source: secure@microsoft.com
Patch Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21529
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21529
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
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

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.8 / 10.0
EPSS (Exploit Probability)
36.7%
97th percentile
Exploitation Status
Actively Exploited
Remediation due: 2026-04-27

Weaknesses (CWE)

CWE-502

Affected Vendors

microsoft

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