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CVE-2025-24990

Microsoft is aware of vulnerabilities in the third party Agere Modem driver that ships natively with supported Windows operating systems.

High Known exploited
Severity
7.8 / 10
High · CVSS 3.1
Exploit chance (EPSS)
6.37%
Chance of exploitation in the next 30 days. Higher than 93.66% of scored vulnerabilities.
Known exploited
Yes
In CISA's catalog since Oct 14, 2025
Weakness
CWE-822 Untrusted Pointer Dereference
Fix
None yet
No fixed version published
Exploited in the wild. Microsoft Windows Untrusted Pointer Dereference Vulnerability (Microsoft Windows). 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. Due for U.S. federal agencies by Nov 4, 2025.

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.

How to fix

No fixed version has been published yet. Until one is, remove or replace the package, or turn off or isolate the affected feature. This page updates when a fix ships.

Severity breakdown

CVSS 3.1 7.8

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Weakness

CWE-822: Untrusted Pointer Dereference

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

References

Advisories

Other links

Timeline

  1. Added to CISA's Known Exploited Vulnerabilities catalog
  2. Published
  3. Remediation due for U.S. federal agencies
  4. Last updated by the source
  5. Latest EPSS score
AdvisorySeverityWhy it's related
CVE-2024-35250
Windows Kernel-Mode Driver Elevation of Privilege Vulnerability
High Known exploited Same weakness, CWE-822
CVE-2024-21338
Windows Kernel Elevation of Privilege Vulnerability
High Known exploited Same weakness, CWE-822
CVE-2023-36033
Windows DWM Core Library Elevation of Privilege Vulnerability
High Known exploited Same weakness, CWE-822
CVE-2023-29360
Microsoft Streaming Service Elevation of Privilege Vulnerability
High Known exploited Same weakness, CWE-822
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