CVE-2021-26857

CVE-2021-26857 is an on‑premises Microsoft Exchange Server remote code execution vulnerability in the Unified Messaging deserialization path. The issue involves insecure deserialization of header data (ContactInfo) within voicemail processing, where an attacker could craft a Base64-encoded header...

Microsoft Exchange Server Remote Code Execution (CVE-2021-26857; CVE-2021-26858)

A remote code execution vulnerability exists in Microsoft Microsoft Exchange. Successful exploitation of this vulnerability could allow a remote attacker to execute arbitrary code on the affected system...

CVE-2020-26857

This CVE entry is rejected/not used and does not represent an active vulnerability.