CVE-2023-21529
high
Microsoft
⚠️ CISA KEV — Exploited in the Wild
CVSS v3 Base Score
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score
58.9%
Exploitation probability in 30 days
Top 2% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: February 14, 2023 (1185 days ago)
Last Modified: April 14, 2026
Vendor: Microsoft
Source: NVD
⚠️ CISA Known Exploited Vulnerability
Added to KEV: 2026-04-13
Remediation Due: 2026-04-27 (⚠ 18d overdue)
Vulnerability Report
Generated by CyberWatcher
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
CWE
CWE-502Affected Products
microsoft exchange server