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Not yet scored Actively exploited Used in ransomware

CVE-2021-27065

Microsoft Exchange Server Remote Code Execution Vulnerability

Description

Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution. This vulnerability is part of the ProxyLogon exploit chain.

Recommended action

Apply updates per vendor instructions.

CISA remediation due date for U.S. federal agencies: 3 May 2022.

Collected automatically from public sources. Verify affected versions and fixes in the vendor's notice before acting.