CVE-2025-26686: Microsoft Windows 10 1507

High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days.

Sensitive data storage in improperly locked memory in Windows TCP/IP allows an unauthorized attacker to execute code over a network.

Affected products

• Microsoft Windows 10 1507: before 10.0.10240.20978 (fixed in 10.0.10240.20978)
• Microsoft Windows 10 1607: before 10.0.14393.7969 (fixed in 10.0.14393.7969)
• Microsoft Windows 10 1809: before 10.0.17763.7136 (fixed in 10.0.17763.7136)
• Microsoft Windows 10 21h2: before 10.0.19044.5737 (fixed in 10.0.19044.5737)
• Microsoft Windows 10 22h2: before 10.0.19045.5737 (fixed in 10.0.19045.5737)
• Microsoft Windows 11 22h2: before 10.0.22621.5189 (fixed in 10.0.22621.5189)
• Microsoft Windows 11 23h2: before 10.0.22631.5189 (fixed in 10.0.22631.5189)
• Microsoft Windows 11 24h2: before 10.0.26100.3775 (fixed in 10.0.26100.3775)
• 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 10.0.14393.7969 (fixed in 10.0.14393.7969)
• Microsoft Windows Server 2019: before 10.0.17763.7136 (fixed in 10.0.17763.7136)
• Microsoft Windows Server 2022: before 10.0.20348.3453 (fixed in 10.0.20348.3453)
• Microsoft Windows Server 2022 23h2: before 10.0.25398.1551 (fixed in 10.0.25398.1551)
• Microsoft Windows Server 2025: before 10.0.26100.3775 (fixed in 10.0.26100.3775)

Published 2025-04-08. Last modified 2026-06-17.