CVE-2025-21333 · netVigilance record NV25-0008
Microsoft Windows Hyper-V NT Kernel Integration VSP Heap-based Buffer Overflow
past due
What to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA deadline 2025-02-04 · passed 1 year 7 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
Microsoft Windows Hyper-V NT Kernel Integration VSP contains a heap-based buffer overflow vulnerability that allows a local attacker to gain SYSTEM privileges.
Who is affected
Microsoft Windows. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-122.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 1 year 7 months ago
Sources
- NVD entry for CVE-2025-21333 nvd.nist.gov/vuln/detail/CVE-2025-21333
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- msrc.microsoft.com msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-21333
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2025-21333