Privilege escalation in Microsoft Windows 10
CVE-2021-26863
Windows Win32k Elevation of Privilege Vulnerability
Vulnerability class: Privilege Escalation
EPSS: 0.122 (95.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Microsoft Windows_10 — versions 20h2, 1803, 1809
- Microsoft Windows 10 Version 1803 — versions 10.0.0
- Microsoft Windows 10 Version 1809 — versions 10.0.0
- Microsoft Windows 10 Version 1909 — versions 10.0.0
- Microsoft Windows 10 Version 2004 — versions 10.0.0
- Microsoft Windows 10 Version 20h2 — versions 10.0.0
- Microsoft Windows_server_2016 — versions 20h2, 1909, 2004
- Microsoft Windows Server 2019 — versions 10.0.0
- Microsoft Windows_server_2019
- Microsoft Windows Server 2019 (Server Core Installation) — versions 10.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secure@microsoft.com (Patch, x_refsource_MISC, Vendor Advisory)
- secure@microsoft.com (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-26863?
- CVE-2021-26863 is a high-severity vulnerability in Microsoft Windows 10, classified under Improper Privilege Management. CVSS score: 7.0/10. Published 2021-03-11.
- How severe is CVE-2021-26863?
- High severity. CVSS v3 base score is 7.0 out of 10.
- Is CVE-2021-26863 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.