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High 7.8Known exploited (CISA KEV)Published Jan 14, 2025
CVE-2025-21334Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability
Updated under an hour ago ()
Does this affect you?
It affects Microsoft Windows 10 Version 21H2 and 7 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Jan 14, 2025; federal agencies had to remediate by Feb 4, 2025. Treat that date as your deadline.
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Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
- Weakness (CWE)
- CWE-416
- Known exploited
- Added to CISA KEV Jan 14, 2025; federal remediation due Feb 4, 2025Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 1.56% (percentile 75)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Jun 9, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Windows 10 Version 21H2 microsoft:windows_10_21h2 | from 10.0.19044.0 before 10.0.19044.5371 | CNA record |
Microsoft Windows 10 Version 22H2 microsoft:windows_10_22h2 | from 10.0.19045.0 before 10.0.19045.5371 | CNA record |
Microsoft Windows 11 version 22H2 microsoft:windows_11_22h2 | from 10.0.22621.0 before 10.0.22621.4751 | CNA record |
Microsoft Windows 11 version 22H3 microsoft:windows_11_22h3 | from 10.0.22631.0 before 10.0.22631.4751 | CNA record |
Microsoft Windows 11 Version 23H2 microsoft:windows_11_23h2 | from 10.0.22631.0 before 10.0.22631.4751 | CNA record |
Microsoft Windows 11 Version 24H2 microsoft:windows_11_24h2 | from 10.0.26100.0 before 10.0.26100.2894 | CNA record |
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) microsoft:windows_server_2022_23h2 | from 10.0.25398.0 before 10.0.25398.1369 | CNA record |
Microsoft Windows Server 2025 microsoft:windows_server_2025 (from the name) | from 10.0.26100.0 before 10.0.26100.2894 | CNA record |
microsoft windows_10_21h2 microsoft:windows_10_21h2 | before 10.0.19044.5371 | NVD |
microsoft windows_10_22h2 microsoft:windows_10_22h2 | before 10.0.19045.5371 | NVD |
microsoft windows_11_22h2 microsoft:windows_11_22h2 | before 10.0.22621.4751; before 10.0.22621.4751 | NVD |
microsoft windows_11_23h2 microsoft:windows_11_23h2 | before 10.0.22631.4751; before 10.0.22631.4751 | NVD |
microsoft windows_11_24h2 microsoft:windows_11_24h2 | before 10.0.26100.2894; before 10.0.26100.2894 | NVD |
microsoft windows_server_2022_23h2 microsoft:windows_server_2022_23h2 | before 10.0.25398.1369 | NVD |
microsoft windows_server_2025 microsoft:windows_server_2025 | before 10.0.26100.2894 | NVD |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21334vendor-advisory, patch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21334us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.