KEV · Actively exploited
CVE-2021-40444
HIGH 8.8
KEV
Microsoft MSHTML Remote Code Execution Vulnerability
EPSS
94.33%
exploit likely
percentile 100.0%
CISA Known Exploited Vulnerability
- Added to KEV
- 2021-11-03
- Remediation deadline
- 2021-11-17
- 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) 10.0.20348.230 Windows Server 2022 10.0.20348.230 Windows Server 2019 (Server Core installation) 10.0.17763.2183 Windows Server 2019 10.0.17763.2183 Windows Server 2016 (Server Core installation) 10.0.14393.4651 Windows Server 2016 10.0.14393.4651 Windows 10 21H1 · 2021-H1 10.0.19043.1237 Windows 10 20H2 · 2020-H2 10.0.19042.1237 Windows 10 2004 · 2020-04 10.0.19041.1237 Windows 10 1909 · 2019-09 10.0.18363.1801 Windows 10 1809 · 2018-09 10.0.17763.2183 Windows 10 1607 · 2016-07 10.0.14393.4651