Actively exploited in the wild
Microsoft Windows Untrusted Pointer Dereference Vulnerability
Microsoft - Windows · Listed in the CISA KEV since 2025-10-14. This indicates confirmed attacks in production environments.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CVE-2025-24990
HighCVSS 7.8KEVSummary
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 the ltmdm64.sys driver, which has been removed in the October cumulative update, and fax modem hardware dependent on this driver will no longer work on Windows.
Risk Assessment
After installing the October cumulative update, fax modem devices requiring the ltmdm64.sys driver will stop working on Windows. This may disrupt legacy fax solutions within the organization.
Recommendation
Identify any dependencies on the ltmdm64.sys driver and fax modem hardware, then plan for replacement or an alternative solution before deploying the update. Microsoft recommends removing any existing dependencies on this hardware.
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Original NVD description (English source)
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.