CVE-2021-26427
At a glance
- Severity
- CRITICAL 9.0
- EPSS
- EPSS 0.89 % · percentile 59 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- microsoft
- NVD status
- Modified
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Scores
| Version | Score | Vector | Scored by |
|---|
| CVSS 3.1 | CRITICAL 9.0 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C | microsoft |
| CVSS 3.1 | CRITICAL 9.0 | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | NVD · secure@microsoft.com (Secondary) |
| CVSS 3.1 | CRITICAL 9.6 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | NVD · nvd@nist.gov (Secondary) |
| CVSS 2.0 | MEDIUM 5.8 | AV:A/AC:L/Au:N/C:P/I:P/A:P | NVD · nvd@nist.gov (Primary) |
European references
CERT-FR advisories
Affected configurations (NVD CPE)
cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_21:*:*:*:*:*:*cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_22:*:*:*:*:*:*cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_10:*:*:*:*:*:*cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_11:*:*:*:*:*:*
Affected products
References
Sources
