Description
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.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1507 | >= 10.0.10240.0, < 10.0.10240.21161 |
| Microsoft | Windows 10 Version 1607 | >= 10.0.14393.0, < 10.0.14393.8519 |
| Microsoft | Windows 10 Version 1809 | >= 10.0.17763.0, < 10.0.17763.7919 |
| Microsoft | Windows 10 Version 21H2 | >= 10.0.19044.0, < 10.0.19044.6456 |
| Microsoft | Windows 10 Version 22H2 | >= 10.0.19045.0, < 10.0.19045.6456 |
| Microsoft | Windows 11 version 22H2 | >= 10.0.22621.0, < 10.0.22621.6060 |
| Microsoft | Windows 11 Version 23H2 | >= 10.0.22631.0, < 10.0.22631.6060 |
| Microsoft | Windows 11 Version 24H2 | >= 10.0.26100.0, < 10.0.26100.6899 |
| Microsoft | Windows 11 Version 25H2 | >= 10.0.26200.0, < 10.0.26200.6899 |
| Microsoft | Windows Server 2008 R2 Service Pack 1 | >= 6.1.7601.0, < 6.1.7601.27974 |
| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) | >= 6.1.7601.0, < 6.1.7601.27974 |
| Microsoft | Windows Server 2008 Service Pack 2 | >= 6.0.6003.0, < 6.0.6003.23571 |
| Microsoft | Windows Server 2008 Service Pack 2 (Server Core installation) | >= 6.0.6003.0, < 6.0.6003.23571 |
| Microsoft | Windows Server 2012 | >= 6.2.9200.0, < 6.2.9200.25722 |
| Microsoft | Windows Server 2012 (Server Core installation) | >= 6.2.9200.0, < 6.2.9200.25722 |
| Microsoft | Windows Server 2012 R2 | >= 6.3.9600.0, < 6.3.9600.22824 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | >= 6.3.9600.0, < 6.3.9600.22824 |
| Microsoft | Windows Server 2016 | >= 10.0.14393.0, < 10.0.14393.8519 |
| Microsoft | Windows Server 2016 (Server Core installation) | >= 10.0.14393.0, < 10.0.14393.8519 |
| Microsoft | Windows Server 2019 | >= 10.0.17763.0, < 10.0.17763.7919 |
| Microsoft | Windows Server 2019 (Server Core installation) | >= 10.0.17763.0, < 10.0.17763.7919 |
| Microsoft | Windows Server 2022 | >= 10.0.20348.0, < 10.0.20348.4294 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | >= 10.0.25398.0, < 10.0.25398.1913 |
| Microsoft | Windows Server 2025 | >= 10.0.26100.0, < 10.0.26100.6899 |
| Microsoft | Windows Server 2025 (Server Core installation) | >= 10.0.26100.0, < 10.0.26100.6899 |
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24990Vendor Advisory
- https://www.vicarius.io/vsociety/posts/cve-2025-24990-detection-script-elevation-of-privilege-vulnerability-in-agere-modem-driver-affecting-windowsThird Party Advisory
- https://www.vicarius.io/vsociety/posts/cve-2025-24990-mitigation-script-elevation-of-privilege-vulnerability-in-agere-modem-driver-affecting-windowsMitigation, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-24990US Government Resource
Timeline
- Published
- Oct 14, 2025
- Last modified
- Jun 17, 2026
- Added to CISA KEV
- Oct 14, 2025
- NVD status
- Analyzed