Oct 2025: Windows Agere Modem Driver Elevation of Privilege Vulnerability
CVE-2025-24990 Published on October 14, 2025

Windows Agere Modem Driver Elevation of Privilege Vulnerability
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.

Vendor Advisory NVD

Known Exploited Vulnerability

This Microsoft Windows Untrusted Pointer Dereference Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Microsoft Windows Agere Modem Driver contains an untrusted pointer dereference vulnerability that allows for privilege escalation. An attacker who successfully exploited this vulnerability could gain administrator privileges.

The following remediation steps are recommended / required by November 4, 2025: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Weakness Type

Untrusted Pointer Dereference

The program obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer.

Products Associated with CVE-2025-24990

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Microsoft Windows 11 2h2

Microsoft Windows 10

Microsoft Windows Server 2019

Microsoft Windows Server 2022

Microsoft Windows 11

Microsoft Windows Server 2025

Microsoft Windows 11 23h2

Microsoft Windows Server 23h2

Microsoft Windows 11 24h2

Microsoft Windows 10 1507

Microsoft Windows Server 2016

Microsoft Windows Server 2008 Sp2

Microsoft Windows Server 2008 R2

Microsoft Windows Server 2012

Microsoft Windows Server 2012 R2

Affected Versions

Microsoft Windows 10 Version 1507:

Version 10.0.10240.0 and below 10.0.10240.21161 is affected.

Microsoft Windows 10 Version 1607:

Version 10.0.14393.0 and below 10.0.14393.8519 is affected.

Microsoft Windows 10 Version 1809:

Version 10.0.17763.0 and below 10.0.17763.7919 is affected.

Microsoft Windows 10 Version 21H2:

Version 10.0.19044.0 and below 10.0.19044.6456 is affected.

Microsoft Windows 10 Version 22H2:

Version 10.0.19045.0 and below 10.0.19045.6456 is affected.

Microsoft Windows 11 version 22H2:

Version 10.0.22621.0 and below 10.0.22621.6060 is affected.

Microsoft Windows 11 Version 23H2:

Version 10.0.22631.0 and below 10.0.22631.6060 is affected.

Microsoft Windows 11 Version 24H2:

Version 10.0.26100.0 and below 10.0.26100.6899 is affected.

Microsoft Windows 11 Version 25H2:

Version 10.0.26200.0 and below 10.0.26200.6899 is affected.

Microsoft Windows Server 2008 R2 Service Pack 1:

Version 6.1.7601.0 and below 6.1.7601.27974 is affected.

Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation):

Version 6.1.7601.0 and below 6.1.7601.27974 is affected.

Microsoft Windows Server 2008 Service Pack 2:

Version 6.0.6003.0 and below 6.0.6003.23571 is affected.

Microsoft Windows Server 2008 Service Pack 2 (Server Core installation):

Version 6.0.6003.0 and below 6.0.6003.23571 is affected.

Microsoft Windows Server 2012:

Version 6.2.9200.0 and below 6.2.9200.25722 is affected.

Microsoft Windows Server 2012 (Server Core installation):

Version 6.2.9200.0 and below 6.2.9200.25722 is affected.

Microsoft Windows Server 2012 R2:

Version 6.3.9600.0 and below 6.3.9600.22824 is affected.

Microsoft Windows Server 2012 R2 (Server Core installation):

Version 6.3.9600.0 and below 6.3.9600.22824 is affected.

Microsoft Windows Server 2016:

Version 10.0.14393.0 and below 10.0.14393.8519 is affected.

Microsoft Windows Server 2016 (Server Core installation):

Version 10.0.14393.0 and below 10.0.14393.8519 is affected.

Microsoft Windows Server 2019:

Version 10.0.17763.0 and below 10.0.17763.7919 is affected.

Microsoft Windows Server 2019 (Server Core installation):

Version 10.0.17763.0 and below 10.0.17763.7919 is affected.

Microsoft Windows Server 2022:

Version 10.0.20348.0 and below 10.0.20348.4294 is affected.

Microsoft Windows Server 2022, 23H2 Edition (Server Core installation):

Version 10.0.25398.0 and below 10.0.25398.1913 is affected.

Microsoft Windows Server 2025:

Version 10.0.26100.0 and below 10.0.26100.6899 is affected.

Microsoft Windows Server 2025 (Server Core installation):

Version 10.0.26100.0 and below 10.0.26100.6899 is affected.

Exploit Probability

EPSS

6.43%

Percentile

90.86%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.