CVE-2023-21529 - Microsoft Exchange Server Deserialization of Untrusted Data Vulnerability
Microsoft Exchange Server contains a deserialization of untrusted data that allows an authenticated attacker to achieve remote code execution.
- Severity
- critical
- Product
- Microsoft Exchange Server
- Published
- 2026-04-13
- EPSS
- 0.593
- CISA KEV
- Known exploited
- Ransomware
- Known campaign use
References and validation
- https://github.com/search?q=CVE-2023-21529&type=repositories
- https://nvd.nist.gov/vuln/detail/CVE-2023-21529
Entries are refreshed from CISA KEV and FIRST EPSS. Validate applicability before testing.