CVE Record
[ HIGH ]CVE-2021-26858
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.
- Vendor
- Microsoft
- Product
- Exchange Server
- CVSS
- 7.8
- EPSS (exploit probability)
- 89.5%
- Status
- kevransomware use
- CISA patch-by (BOD 22-01)
- Published
Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution. This vulnerability is part of the ProxyLogon exploit chain.
Added to CISA’s Known Exploited Vulnerabilities catalog on 2021-11-03. Required action per CISA: Apply updates per vendor instructions. Due date: 2022-05-03.
This is an auto-synced KEV catalog record pending a full 0dayNews write-up — see CISA’s KEV catalog and the NVD record linked above for primary sources.