CVE-2025-24990: Microsoft Windows Untrusted Pointer Dereference Vulnerability

High severity, CVSS 7.8. Actively exploited: in CISA KEV since 2025-10-14. EPSS: 6.4% chance of exploitation in the next 30 days.

Microsoft is aware of vulnerabilities in the third party Agere Modem driver that ships natively with supported Windows operating systems. This is an announcement of the upcoming removal of ltmdm64.sys driver. The driver has been removed in the October cumulative update. Fax modem hardware dependent on this specific driver will no longer work on Windows. Microsoft recommends removing any existing dependencies on this hardware.

Affected products

• Microsoft Windows 10 1507: before 10.0.10240.21161 (fixed in 10.0.10240.21161)
• Microsoft Windows 10 1607: before 10.0.14393.8519 (fixed in 10.0.14393.8519)
• Microsoft Windows 10 1809: before 10.0.17763.7919 (fixed in 10.0.17763.7919)
• Microsoft Windows 10 21h2: before 10.0.19044.6456 (fixed in 10.0.19044.6456)
• Microsoft Windows 10 22h2: before 10.0.19045.6456 (fixed in 10.0.19045.6456)
• Microsoft Windows 11 22h2: before 10.0.22621.6060 (fixed in 10.0.22621.6060)
• Microsoft Windows 11 23h2: up to and including 10.0.22631.6060
• Microsoft Windows 11 24h2: before 10.0.26100.6899 (fixed in 10.0.26100.6899)
• Microsoft Windows 11 25h2: before 10.0.26200.6899 (fixed in 10.0.26200.6899)
• 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: up to and including 10.0.14393.8519
• Microsoft Windows Server 2019: before 10.0.17763.7919 (fixed in 10.0.17763.7919)
• Microsoft Windows Server 2022: before 10.0.20348.4294 (fixed in 10.0.20348.4294)
• Microsoft Windows Server 2022 23h2: before 10.0.25398.1913 (fixed in 10.0.25398.1913)
• Microsoft Windows Server 2025: up to and including 10.0.26100.6899

Published 2025-10-14. Last modified 2026-06-17.