CVE-2025-24990

high-risk

Published 2025-10-14

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.

Do I need to act?

3.9% chance of exploitation in next 30 days

EPSS score — moderate exploit probability

CISA KEV: actively exploited in the wild

On the Known Exploited Vulnerabilities catalog — federal agencies must patch

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.8/10 High

LOCAL / LOW complexity

Affected Products (18)

Windows 10 1507

Windows 10 1607

Windows 10 1809

Windows 10 21H2

Windows 10 22H2

Windows 11 22H2

Windows 11 23H2

Windows 11 24H2

Windows 11 25H2

Windows Server 2008

Windows Server 2012

Windows Server 2016

Windows Server 2019

Windows Server 2022

Windows Server 2022 23H2

Windows Server 2025

Affected Vendors

Microsoft

References (4)

Vendor Advisory https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24990

Third Party Advisory https://www.vicarius.io/vsociety/posts/cve-2025-24990-detection-script-elevation...

Mitigation https://www.vicarius.io/vsociety/posts/cve-2025-24990-mitigation-script-elevatio...

US Government Resource https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-...

/ 100

high-risk

Severity 24/34 · High

Exploitability 14/34 · Moderate

Exposure 19/34 · Moderate