Disclosure summary
Microsoft Exchange Server contains a deserialization of untrusted data that allows an authenticated attacker to achieve remote code execution.
CISA remediation guidance
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Original records & references
PUBLISHED 2026-04-13T00:00:00-04:00
MODIFIED 2026-04-13T00:00:00-04:00
INGESTED 2026-10-06T11:42:57-04:00