CVE-2023-21529
Microsoft Exchange Server Deserialization of Untrusted Data Vulnerability
8.8
CVSS 3.1
59.3 %
EPSS (current)
2026-04-13
KEV addition
Yes
Ransomware
Timeline
Publication, first public exploit and KEV addition on a day axis.
Key facts
Vendor / product: Microsoft / Exchange Server
Published: 2023-02-14 · Due (CISA): 2026-04-27
CWE: CWE-502 · EU list: no
Exploit references (metadata only)
No public exploit references recorded.