CVE-2021-27077
Medium
Elevated severity or exploit probability.
CVSS base
7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
1.4%
72.0th percentile
CISA KEV
Not listed
Weakness / dates
CWE-269
Published 2021-03-11 · modified 2026-08-19
CVSS breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2021-03-11 — Published (NVD)
- 2026-08-19 — Last modified (NVD)
Description
Windows Win32k Elevation of Privilege Vulnerability
Affected
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-21-494/
- https://www.zerodayinitiative.com/advisories/ZDI-21-495/
- https://www.zerodayinitiative.com/advisories/ZDI-21-496/
- https://www.zerodayinitiative.com/advisories/ZDI-21-497/
- https://www.zerodayinitiative.com/advisories/ZDI-21-498/
- https://www.zerodayinitiative.com/advisories/ZDI-21-499/
- https://www.zerodayinitiative.com/advisories/ZDI-21-500/
- https://www.zerodayinitiative.com/advisories/ZDI-21-501/