CVE-2025-64673: Microsoft Windows 10 1809

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Improper access control in Storvsp.sys Driver allows an authorized attacker to elevate privileges locally.

Affected products

• Microsoft Windows 10 1809: before 10.0.17763.8146 (fixed in 10.0.17763.8146)
• Microsoft Windows 10 21h2: before 10.0.19044.6691 (fixed in 10.0.19044.6691)
• Microsoft Windows 10 22h2: before 10.0.19045.6691 (fixed in 10.0.19045.6691)
• Microsoft Windows 11 23h2: before 10.0.22631.6345 (fixed in 10.0.22631.6345)
• Microsoft Windows 11 24h2: before 10.0.26100.7392 (fixed in 10.0.26100.7392)
• Microsoft Windows 11 25h2: before 10.0.26200.7392 (fixed in 10.0.26200.7392)
• Microsoft Windows Server 2019: before 10.0.17763.8146 (fixed in 10.0.17763.8146)
• Microsoft Windows Server 2022: before 10.0.20348.4467 (fixed in 10.0.20348.4467)
• Microsoft Windows Server 2022 23h2: before 10.0.25398.2025 (fixed in 10.0.25398.2025)
• Microsoft Windows Server 2025: before 10.0.26100.7392 (fixed in 10.0.26100.7392)

Published 2025-12-09. Last modified 2026-06-17.