CVE-2025-54917: Microsoft Windows 10 1507

Medium severity, CVSS 4.3. EPSS: 0.9% chance of exploitation in the next 30 days.

Protection mechanism failure in Windows MapUrlToZone allows an unauthorized attacker to bypass a security feature over a network.

Affected products

• Microsoft Windows 10 1507: before 10.0.10240.21128 (fixed in 10.0.10240.21128)
• Microsoft Windows 10 1607: before 10.0.14393.8422 (fixed in 10.0.14393.8422)
• Microsoft Windows 10 1809: before 10.0.17763.7792 (fixed in 10.0.17763.7792)
• Microsoft Windows 10 21h2: before 10.0.19044.6332 (fixed in 10.0.19044.6332)
• Microsoft Windows 10 22h2: before 10.0.19045.6332 (fixed in 10.0.19045.6332)
• Microsoft Windows 11 22h2: before 10.0.22621.5909 (fixed in 10.0.22621.5909)
• Microsoft Windows 11 23h2: before 10.0.22631.5909 (fixed in 10.0.22631.5909)
• Microsoft Windows 11 24h2: before 10.0.26100.6508 (fixed in 10.0.26100.6508)
• Microsoft Windows Server 2008: affected versions not specified; version r2 only
• Microsoft Windows Server 2012: affected versions not specified; version r2 only
• Microsoft Windows Server 2016: before 10.0.14393.8422 (fixed in 10.0.14393.8422)
• Microsoft Windows Server 2019: before 10.0.17763.7792 (fixed in 10.0.17763.7792)
• Microsoft Windows Server 2022: before 10.0.20348.4106 (fixed in 10.0.20348.4106)
• Microsoft Windows Server 2022 23h2: before 10.0.25398.1849 (fixed in 10.0.25398.1849)
• Microsoft Windows Server 2025: before 10.0.26100.6508 (fixed in 10.0.26100.6508)

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