CVE-2025-21335

Timeline

Detection, updates, and resolution for this record.

1. Jan 14, 2025 · Catalog

   Detected

   Microsoft Windows Hyper-V NT Kernel Integration VSP contains a use-after-free vulnerability that allows a local attacker to gain SYSTEM privileges.

2. Jan 14, 2025 · CISA KEV

   Known exploited

   Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

3. Feb 4, 2025 · CISA KEV

   Remediation due

   Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

4. Sep 24, 2026 · Catalog

   Updated

   Microsoft Windows Hyper-V NT Kernel Integration VSP contains a use-after-free vulnerability that allows a local attacker to gain SYSTEM privileges.

Affected

• cpe microsoft/windows 10 21h2version unspecified
• cpe microsoft/windows 10 22h2version unspecified
• cpe microsoft/windows 11 22h2version unspecified
• cpe microsoft/windows 11 23h2version unspecified
• cpe microsoft/windows 11 24h2version unspecified
• vendor Microsoft Windowsversion unspecified

Sources

• CISA KEVCVE-2025-21335

  Microsoft Windows Hyper-V NT Kernel Integration VSP contains a use-after-free vulnerability that allows a local attacker to gain SYSTEM privileges.

  cisa.gov
• CVE.orgCVE-2025-21335

  Official CVE identifier

  cve.org
• FIRST EPSSCVE-2025-21335

  30-day exploitation probability 1.4%

  first.org
• NIST NVDCVE-2025-21335

  Windows Hyper-V NT Kernel Integration VSP Elevation of Privilege Vulnerability

  nvd.nist.gov

References

• CISA note · msrc.microsoft.com
• Patch · msrc.microsoft.com
• CISA note · nvd.nist.gov
• US Government Resource · cisa.gov