CVE-2021-27077
At a glance
- Severity
- HIGH 7.8
- EPSS
- EPSS 1.44 % · percentile 73 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- microsoft
- NVD status
- Modified
Description
Windows Win32k Elevation of Privilege Vulnerability
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C | microsoft |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · secure@microsoft.com (Secondary) |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Secondary) |
| CVSS 2.0 | MEDIUM 4.6 | AV:L/AC:L/Au:N/C:P/I:P/A:P | NVD · nvd@nist.gov (Primary) |
Weaknesses (CWE)
European references
- ENISA EUVD · EUVD-2021-13848
- GCVE · GCVE-0-2021-27077
CERT-FR advisories
- CERTFR-2021-AVI-181 — Multiples vulnérabilités dans Microsoft Windows · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*cpe:2.3:o:microsoft:windows_server_2008:r2:sp2:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:*cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
Affected products
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27077
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27077
- https://www.zerodayinitiative.com/advisories/ZDI-21-287/
- https://www.zerodayinitiative.com/advisories/ZDI-21-403/
- https://www.zerodayinitiative.com/advisories/ZDI-21-482/
- https://www.zerodayinitiative.com/advisories/ZDI-21-499/
- https://www.zerodayinitiative.com/advisories/ZDI-21-494/
- https://www.zerodayinitiative.com/advisories/ZDI-21-497/
- https://www.zerodayinitiative.com/advisories/ZDI-21-501/
- https://www.zerodayinitiative.com/advisories/ZDI-21-500/
- https://www.zerodayinitiative.com/advisories/ZDI-21-496/
- https://www.zerodayinitiative.com/advisories/ZDI-21-498/
- https://www.zerodayinitiative.com/advisories/ZDI-21-495/
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 |