CVE-2021-26858
Microsoft Exchange Server Remote Code Execution Vulnerability
⚠ KEVEPSS 89.5%
Description
Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution. This vulnerability is part of the ProxyLogon exploit chain.
How to fix CVE-2021-26858
No package mapping is available — consult the references below for vendor-specific guidance.
Is CVE-2021-26858 being exploited?
Yes — CVE-2021-26858 is on the CISA Known Exploited Vulnerabilities (KEV) catalog. Patch immediately.
Affected packages (0)
No package mapping in OSV.