CVEvulnerability
CVE-2021-40450
CISA Known Exploited Vulnerability
Microsoft Win32k Privilege Escalation Vulnerability — Microsoft Win32k
Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.
- Added to KEV
- 2022-04-25
- Remediation due
- 2022-05-16
- Ransomware use
- Unknown
- Required action
- Apply updates per vendor instructions.
- Notes
- https://nvd.nist.gov/vuln/detail/CVE-2021-40450
- Status
- Analyzed
- Published
- 2021-10-13
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 4.6 MEDIUM — AV:L/AC:L/Au:N/C:P/I:P/A:P
Description
Win32k Elevation of Privilege Vulnerability
Affected configurations
• microsoft windows 10 1809 (< 10.0.17763.2237)
• microsoft windows 10 1909 (< 10.0.18363.1854)
• microsoft windows 10 2004 (< 10.0.19041.1288)
• microsoft windows 10 20h2 (< 10.0.19042.1288)
• microsoft windows 10 21h1 (< 10.0.19043.1288)
• microsoft windows 11 21h2 (< 10.0.22000.258)
• microsoft windows server 2004 (< 10.0.19041.1288)
• microsoft windows server 2019 (< 10.0.17763.2237)
• microsoft windows server 2022 (< 10.0.20348.288)
• microsoft windows server 20h2 (< 10.0.19042.1288)
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40450 Patch, Vendor Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40450 Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-40450 US Government Resource