CVE

CVE-2021-26857

P1⬤ KNOWN RANSOMWARE USE

Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft · Exchange Server

Date added (CISA)

2021-11-03

Remediation due

2022-05-03

Known ransomware use

Yes

Remediation priority

P1 — known ransomware use · past CISA due date

ATT&CK mapping

How this CVE is exploited or what it enables, from the CTID Mappings Explorer.