CVE-2021-34458
At a glance
- Severity
- CRITICAL 9.9
- EPSS
- EPSS 2.63 % · percentile 85 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- microsoft
- NVD status
- Modified
Description
Windows Kernel Remote Code Execution Vulnerability
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.9 | CVSS:3.1/AV:N/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 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | NVD · secure@microsoft.com (Secondary) |
| CVSS 3.1 | CRITICAL 9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | NVD · nvd@nist.gov (Secondary) |
| CVSS 2.0 | HIGH 9.0 | AV:N/AC:L/Au:S/C:C/I:C/A:C | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2021-21113
- GCVE · GCVE-0-2021-34458
CERT-FR advisories
- CERTFR-2021-AVI-520 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Microsoft · Windows Server 2016 | affected 10.0.14393.0 < 10.0.14393.4530 |
| Microsoft · Windows Server 2016 (Server Core installation) | affected 10.0.14393.0 < 10.0.14393.4530 |
| Microsoft · Windows Server 2019 | affected 10.0.17763.0 < 10.0.17763.2061 |
| Microsoft · Windows Server 2019 (Server Core installation) | affected 10.0.17763.0 < 10.0.17763.2061 |
| Microsoft · Windows Server version 2004 | affected 10.0.0 < 10.0.19041.1110 |
| Microsoft · Windows Server version 20H2 | affected 10.0.0 < 10.0.19042.1110 |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34458
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34458
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |