cve 2025 24990

CVE-2025-24990 is an elevation-of-privilege vulnerability in the legacy Agere soft-modem driver ltmdm64.sys. Microsoft addressed this issue by removing the driver from supported Windows images in the October 2025 cumulative updates. Systems that install this update will lose functionality for fax or analog modem hardware that depends on the ltmdm64.sys driver. The vulnerability affects Windows users who rely on Agere modem hardware, and the removal is part of Microsoft's ongoing security maintenance. Discussions on WindowsForum cover the impact of this change, including potential workarounds and implications for legacy hardware.