{"cvss":0.0,"datePublished":"2026-04-06T00:00:00Z","dateUpdated":"2026-04-06T00:00:00Z","description":"Microsoft Exchange Server contains a deserialization of untrusted data that allows an authenticated attacker to achieve remote code execution.","dueDate":"2026-04-27T00:00:00Z","id":"CVE-2023-21529","kev_catalogs":["vulncheck"],"knownRansomwareCampaignUse":"Known","product":"Exchange Server","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","severity":"CRITICAL","source":"vulncheck_kev","title":"Microsoft Exchange Server Deserialization of Untrusted Data Vulnerability","vendor":"Microsoft"}