CVE-2021-26857: Microsoft Exchange Server Remote Code Execution Vulnerability
Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution. This vulnerability is part of the ProxyLogon exploit chain. Required action: Apply updates per vendor instructions.
· high severity · unattributed attribution
Evidence and provenance
- Original source
- CISA KEV report ↗
- Published
- 2021-11-03T00:00:00Z
- Confidence basis
- No actor match
- Record ID
4e9006322604c515b545
Vulnerabilities
CVE-2021-26857
Use and citation
Verify the original report before making operational decisions. Cite this permanent page together with the original source, publication date, confidence level, and review status.