# CVE-2025-24990

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.

- Page: https://www.vulneraibility.com/cve/CVE-2025-24990
- CVSS: 7.8
- Known exploited: yes, in CISA KEV since 2025-10-14; CISA due date 2025-11-04
- EPSS: 6.37%
- Unvetted proof-of-concept code on GitHub: 2 GitHub proofs of concept (first 2025-10-16)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-10-15)
- Weakness: CWE-822
- Published: 2025-10-14

## Affected versions

- Microsoft Windows 10 Version 1507: affected >= 10.0.10240.0 and < 10.0.10240.21161
- Microsoft Windows 10 Version 1607: affected >= 10.0.14393.0 and < 10.0.14393.8519
- Microsoft Windows 10 Version 1809: affected >= 10.0.17763.0 and < 10.0.17763.7919
- Microsoft Windows 10 Version 21H2: affected >= 10.0.19044.0 and < 10.0.19044.6456
- Microsoft Windows 10 Version 22H2: affected >= 10.0.19045.0 and < 10.0.19045.6456
- Microsoft Windows 11 version 22H2: affected >= 10.0.22621.0 and < 10.0.22621.6060
- Microsoft Windows 11 Version 23H2: affected >= 10.0.22631.0 and < 10.0.22631.6060
- Microsoft Windows 11 Version 24H2: affected >= 10.0.26100.0 and < 10.0.26100.6899
- Microsoft Windows 11 Version 25H2: affected >= 10.0.26200.0 and < 10.0.26200.6899
- Microsoft Windows Server 2008 R2 Service Pack 1: affected >= 6.1.7601.0 and < 6.1.7601.27974
- Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation): affected >= 6.1.7601.0 and < 6.1.7601.27974
- Microsoft Windows Server 2008 Service Pack 2: affected >= 6.0.6003.0 and < 6.0.6003.23571
- Microsoft Windows Server 2008 Service Pack 2 (Server Core installation): affected >= 6.0.6003.0 and < 6.0.6003.23571
- Microsoft Windows Server 2012: affected >= 6.2.9200.0 and < 6.2.9200.25722
- Microsoft Windows Server 2012 R2: affected >= 6.3.9600.0 and < 6.3.9600.22824
- Microsoft Windows Server 2012 R2 (Server Core installation): affected >= 6.3.9600.0 and < 6.3.9600.22824
- Microsoft Windows Server 2012 (Server Core installation): affected >= 6.2.9200.0 and < 6.2.9200.25722
- Microsoft Windows Server 2016: affected >= 10.0.14393.0 and < 10.0.14393.8519
- Microsoft Windows Server 2016 (Server Core installation): affected >= 10.0.14393.0 and < 10.0.14393.8519
- Microsoft Windows Server 2019: affected >= 10.0.17763.0 and < 10.0.17763.7919
- Microsoft Windows Server 2019 (Server Core installation): affected >= 10.0.17763.0 and < 10.0.17763.7919
- Microsoft Windows Server 2022: affected >= 10.0.20348.0 and < 10.0.20348.4294
- Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): affected >= 10.0.25398.0 and < 10.0.25398.1913
- Microsoft Windows Server 2025: affected >= 10.0.26100.0 and < 10.0.26100.6899
- Microsoft Windows Server 2025 (Server Core installation): affected >= 10.0.26100.0 and < 10.0.26100.6899

A version outside these ranges is not a statement that it is unaffected.

## References

- [patch] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24990
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-24990
- [other] https://www.vicarius.io/vsociety/posts/cve-2025-24990-detection-script-elevation-of-privilege-vulnerability-in-agere-modem-driver-affecting-windows
- [other] https://www.vicarius.io/vsociety/posts/cve-2025-24990-mitigation-script-elevation-of-privilege-vulnerability-in-agere-modem-driver-affecting-windows

---
Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.