CVE-2021-26855 — Microsoft Exchange Server Remote Code Execution Vulnerability
2021-11-03 • CISA Known Exploited Vulnerability
[event] Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution. This vulnerability is part of the ProxyLogon exploit chain.
> AFFECTED SOFTWARE
| Field | Value |
|---|---|
| Vendor | Microsoft |
| Product | Exchange Server |
| CWE | CWE-918 |
| CVE ID | CVE-2021-26855 |
| Date Added | 2021-11-03 |
| Due Date | 2022-05-03 |
| Ransomware Campaign | Known — this vulnerability has been leveraged in ransomware campaigns |
> MITIGATION
Apply updates per vendor instructions.
Due Date: 2022-05-03