CVE-2021-34516
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)
1.3%
69.0th percentile
CISA KEV
Not listed
Weakness / dates
CWE-20
Published 2021-07-14 · modified 2026-08-10
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
- 2021-07-14 — Published (NVD)
- 2026-08-10 — Last modified (NVD)
Description
Win32k Elevation of Privilege Vulnerability
Affected
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34516
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34516
- https://www.zerodayinitiative.com/advisories/ZDI-21-1004/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1005/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1006/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1007/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1008/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1009/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1010/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1011/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1012/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1013/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1014/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1015/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1016/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1017/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1018/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1019/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1020/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1021/
- https://www.zerodayinitiative.com/advisories/ZDI-21-1022/
- https://www.zerodayinitiative.com/advisories/ZDI-21-895/