How severe is CVE-2025-24990?

CVE-2025-24990 has a CVSS 3.1 base score of 7.8 (HIGH). EPSS estimates a 6.4% probability of exploitation in the next 30 days. It is listed in the CISA Known Exploited Vulnerabilities catalog.

CVE-2025-24990: Windows Agere Modem Driver Elevation of Privilege

CISA Known Exploited Vulnerabilities

Microsoft Windows Untrusted Pointer Dereference Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV

2025-10-14

Remediation due

2025-11-04

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.

CISA notes
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-24990 ; https://nvd.nist.gov/vuln/detail/CVE-2025-24990

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.

Severity

CVSS 3.1 · CNA7.8 HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

SSVC · CISA-ADP

Exploitationactive

Automatableno

Technical impacttotal

Exploitation Context

as of October 17, 2026

All KEV statistics→

CISA added CVE-2025-24990 to the KEV catalog on the day its CVE record was published. The median for entries added in 2025 is 26 days.
It is one of 391 Microsoft entries in the CISA KEV catalog, and one of 39 added in 2025.
Its current EPSS score (6.4%) is higher than that of 21% of CISA KEV entries.

Affected Products

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

References

3 Links

Vendor advisories

Windows Agere Modem Driver Elevation of Privilege Vulnerability

Other references

Record Details

Published

2025-10-14

Last updated

2026-02-26

Assigner (CNA)

microsoft

Credited to

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Tool categories

Fuzzing Binary Exploitation

CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.

CVE-2025-24990