Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution. This vulnerability is part of the ProxyLogon exploit chain. CISA required action: Apply updates per vendor instructions.
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: kev:CVE-2021-26858
Exchange Server
Source reference: /product
Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record
Related CVEs
CVE-2021-26858
Source reference: /cveID
Publisher severity
No explicit severity was provided.
Linked CVE context
These ratings describe the referenced vulnerabilities and products. They are not a severity rating for every application using this dependency.
Microsoft Exchange Server 2013 Cumulative Update 21, Microsoft Exchange Server 2013 Cumulative Update 22, Microsoft Exchange Server 2013 Cumulative Update 23, Microsoft Exchange Server 2016 Cumulative Update 10, Microsoft Exchange Server 2016 Cumulative Update 11, Microsoft Exchange Server 2016 Cumulative Update 12, Microsoft Exchange Server 2016 Cumulative Update 13, Microsoft Exchange Server 2016 Cumulative Update 14, Microsoft Exchange Server 2016 Cumulative Update 15, Microsoft Exchange Server 2016 Cumulative Update 16, Microsoft Exchange Server 2016 Cumulative Update 17, Microsoft Exchange Server 2016 Cumulative Update 18, Microsoft Exchange Server 2016 Cumulative Update 19, Microsoft Exchange Server 2016 Cumulative Update 8, Microsoft Exchange Server 2016 Cumulative Update 9, Microsoft Exchange Server 2019, Microsoft Exchange Server 2019 Cumulative Update 1, Microsoft Exchange Server 2019 Cumulative Update 2, Microsoft Exchange Server 2019 Cumulative Update 3, Microsoft Exchange Server 2019 Cumulative Update 4, Microsoft Exchange Server 2019 Cumulative Update 5, Microsoft Exchange Server 2019 Cumulative Update 6, Microsoft Exchange Server 2019 Cumulative Update 7, Microsoft Exchange Server 2019 Cumulative Update 8
