high7.8Known exploited
CVE-2021-26858
Microsoft Exchange Server Remote Code Execution Vulnerability
Exploited in the wild
This vulnerability is on a Known Exploited Vulnerabilities catalogue, added 2021-11-03. Federal due date: 2022-05-03.
Apply updates per vendor instructions.
Impact
Microsoft Exchange Server Remote Code Execution Vulnerability
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Exchange Server | Versions 2013, 2016, 2019 |