KEV · Actively exploited
CVE-2021-40449
HIGH 7.8
KEV
Win32k Elevation of Privilege Vulnerability
EPSS
91.51%
exploit likely
percentile 99.7%
CISA Known Exploited Vulnerability
- Added to KEV
- 2021-11-17
- Remediation deadline
- 2021-12-01
- Required action
- Apply updates per vendor instructions.
- Ransomware
- Yes, known ransomware campaign
OS versions that fix this CVE
This CVE is resolved by the following OS security releases. Update the OS to at least the listed version.
- Windows Fixed in Windows Server 2022 (Server Core installation) 10.0.20348.288 Windows Server 2022 10.0.20348.288 Windows Server 2019 (Server Core installation) 10.0.17763.2237 Windows Server 2019 10.0.17763.2237 Windows Server 2016 (Server Core installation) 10.0.14393.4704 Windows Server 2016 10.0.14393.4704 Windows 11 21H2 · 2021-H2 10.0.22000.258 Windows 10 21H1 · 2021-H1 10.0.19041.1288 Windows 10 20H2 · 2020-H2 10.0.19041.1288 Windows 10 2004 · 2020-04 10.0.19041.1288 Windows 10 1909 · 2019-09 10.0.18363.1854 Windows 10 1809 · 2018-09 10.0.17763.2237 Windows 10 1607 · 2016-07 10.0.14393.4704