VDB
msrc_CVE-2026-21244
msrc_CVE-2026-21244
PUBLISHED
CVSS 7.300000190734863 HIGH
Risk Scores
CVSS 3.1
7.300000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Windows Server 2022 10.0.20348.4773 | ||
| Windows 10 Version 22H2 for x64-based Systems <10.0.19045.6937 | ||
| Windows 10 Version 22H2 for x64-based Systems 10.0.19045.6937 | ||
| Windows 10 Version 21H2 for x64-based Systems <10.0.19044.6937 | ||
| Windows 11 version 26H1 for x64-based Systems 10.0.28000.1575 | ||
| Windows Server 2019 (Server Core installation) 10.0.17763.8389 | ||
| Windows Server 2019 (Server Core installation) <10.0.17763.8389 | ||
| Windows Server 2022 (Server Core installation) <10.0.20348.4773 | ||
| Windows 10 Version 21H2 for x64-based Systems 10.0.19044.6937 | ||
| Windows Server 2019 <10.0.17763.8389 | ||
| Windows 10 Version 1809 for x64-based Systems <10.0.17763.8389 | ||
| Windows Server 2025 (Server Core installation) <10.0.26100.32370 | ||
| Windows Server 2025 (Server Core installation) 10.0.26100.32370 | ||
| Windows 11 version 26H1 for x64-based Systems <10.0.28000.1575 | ||
| Windows 10 Version 1809 for x64-based Systems 10.0.17763.8389 | ||
| Windows Server 2019 10.0.17763.8389 | ||
| Windows Server 2022 <10.0.20348.4773 | ||
| Windows 11 Version 26H1 for ARM64-based Systems 10.0.28000.1575 | ||
| Windows Server 2022 (Server Core installation) 10.0.20348.4773 | ||
| Windows 11 Version 26H1 for ARM64-based Systems <10.0.28000.1575 |
Timeline
- Feb 10, 2026 CVE Published
- Nov 1, 2026 Security Advisory
- Nov 1, 2026 Security Advisory
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21244 advisory
- https://msrc.microsoft.com/csaf/advisories/2026/msrc_cve-2026-21244.json advisory
- https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1 url
- https://support.microsoft.com/lifecycle url
- https://www.first.org/cvss url
- https://support.microsoft.com/help/5077179 fix
- https://support.microsoft.com/help/5075904 fix
- https://support.microsoft.com/help/5075906 fix
- https://support.microsoft.com/help/5075943 fix
- https://support.microsoft.com/help/5075912 fix
- https://support.microsoft.com/help/5075899 fix
- https://support.microsoft.com/help/5075942 fix
- https://support.microsoft.com/help/5077181 fix
- https://support.microsoft.com/help/5077212 fix
- https://support.microsoft.com/help/5075941 fix
- https://support.microsoft.com/help/5075897 fix
- https://support.microsoft.com/help/5075999 fix