CVE-2026-26111: Microsoft Windows Server 2012

High severity, CVSS 8.0. EPSS: 0.8% chance of exploitation in the next 30 days.

Integer overflow or wraparound in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to execute code over a network.

Affected products

• Microsoft Windows Server 2012: before 6.2.9200.25973 (fixed in 6.2.9200.25973); version r2 only
• Microsoft Windows Server 2016: before 10.0.14393.8957 (fixed in 10.0.14393.8957)
• Microsoft Windows Server 2019: before 10.0.17763.8511 (fixed in 10.0.17763.8511)
• Microsoft Windows Server 2022: before 10.0.20348.4893 (fixed in 10.0.20348.4893)
• Microsoft Windows Server 2025: before 10.0.26100.32522 (fixed in 10.0.26100.32522)

Published 2026-03-10. Last modified 2026-06-17.