01 Record
CVE-2025-21333
Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability
HighKEVPUBLISHEDCNA: microsoft
CNA base score7.8 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
02 Description
Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability
03 Exploitation and scoring
- Exploitation
- Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2025-01-14. Federal remediation due 2025-02-04.
- SSVC decision
- ExploitationactiveCISA reports credible evidence of active exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 10.06% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 95.6% of scored records. A rank, not a probability.
- NVD base score
- 7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2025-01-14 18:04Z1 YR AGO
- Last updated
- 2026-06-09 18:30Z4 MO AGO
- Reserved
- 2024-12-11
- Assigning CNA
- microsoft
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.8)
- CNA CVSS vector
- 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
- Weaknesses
- CWE-122Heap-based Buffer OverflowVariant
- Data version
- 5.2
- Document digest
- 850da54b2092ee2cb0eff21c474c3ffb8dff2645dc6ec073d8b7b1897a5af862
05 Affected products
VendorProductVersionsPlatforms
MicrosoftWindows 11 version 22H210.0.22621.0 to < 10.0.22621.4751ARM64-based Systems, x64-based Systems
MicrosoftWindows 11 Version 24H210.0.26100.0 to < 10.0.26100.2894ARM64-based Systems, x64-based Systems
MicrosoftWindows Server 2022, 23H2 Edition (Server Core installation)10.0.25398.0 to < 10.0.25398.1369x64-based Systems
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 to < 10.0.26100.2894x64-based Systems
06 References
- msrc.microsoft.comWindows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerabilityhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21333
- www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21333
- www.vicarius.iohttps://www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hyper-v-by-microsoft-mitigation-script
- www.vicarius.iohttps://www.vicarius.io/vsociety/posts/cve-2025-21333-elevated-privilege-exposure-in-windows-hyper-v-by-microsoft-detection-script
- www.exploit-db.comhttps://www.exploit-db.com/exploits/52436