microsoft / Microsoft Exchange Server 2013 Cumulative Update 21

4 vulnerabilities across affected versions.

CVE-2021-26855CRITICAL9.115.00.0 – 15.00.1395.012

CVE-2021-26857HIGH7.815.00.0 – 15.00.1395.012

CVE-2021-26858HIGH7.815.00.0 – 15.00.1395.012

CVE-2021-27065HIGH7.815.00.0 – 15.00.1395.012