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CISA lists this Microsoft vulnerability as known exploited. Its MSRC release detail is outside this installation's collected history.
Microsoft Exchange Server contains a deserialization of untrusted data that allows an authenticated attacker to achieve remote code execution.
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Explore global source statements, affected packages and advisory history for CVE-2023-21529. The catalog has a separate collection scope from Microsoft release records.
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Listed in CISA KEV · added 13 Apr 2026 · Microsoft · Exchange Server
Microsoft Exchange Server contains a deserialization of untrusted data that allows an authenticated attacker to achieve remote code execution.
No EPSS score is available here for this CVE.
Saved 23 Oct 2026 16:01:26 UTC · View this risk record (JSON)
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cve-program · CVE-2023-21529 · Published