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CVE-2025-24990

Windows Agere Modem Driver Elevation of Privilege Vulnerability

HIGH
7.8
CVSS Score
Published: October 14, 2025 at 05:00 PM UTC
Updated: June 17, 2026 at 08:59 AM UTC
17 products affected across 1 vendorWindows Server 2016Windows Server 2019Windows Server 2012

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Severity
HIGH7.8
Exploitation
CISA KEV
Exploit prediction
EPSS 6%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score6.4%

EPSS (Exploit Prediction Scoring System) estimates a 6.4% chance this CVE is exploited in the wild within the next 30 days — higher than 94% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

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.

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.
Ransomware Use
Unknown
Added to KEV
Oct 14, 2025
Remediation Due
Nov 4, 2025
363 days overdue
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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Windows 10 1507· Microsoft
95%
v < 10.0.10240.2116110.0.10240.0 ≤ v < 10.0.10240.2116110.0.10240.0
Affected range stops below 10.0.10240.21161, so it looks safe — our inference, not a vendor statement
Windows 10 1607· Microsoft
95%
v < 10.0.14393.851910.0.14393.0 ≤ v < 10.0.14393.851910.0.14393.0
Affected range stops below 10.0.14393.8519, so it looks safe — our inference, not a vendor statement
Windows 10 1809· Microsoft
95%
v < 10.0.17763.791910.0.17763.0 ≤ v < 10.0.17763.791910.0.17763.0
Affected range stops below 10.0.17763.7919, so it looks safe — our inference, not a vendor statement
Windows 10 21H2· Microsoft
95%
v < 10.0.19044.645610.0.19044.0 ≤ v < 10.0.19044.645610.0.19044.0
Affected range stops below 10.0.19044.6456, so it looks safe — our inference, not a vendor statement
Windows 10 22H2· Microsoft
95%
v < 10.0.19045.645610.0.19045.0 ≤ v < 10.0.19045.645610.0.19045.0
Affected range stops below 10.0.19045.6456, so it looks safe — our inference, not a vendor statement
Windows 11 22H2· Microsoft
95%
v < 10.0.22621.606010.0.22621.0 ≤ v < 10.0.22621.606010.0.22621.0
Affected range stops below 10.0.22621.6060, so it looks safe — our inference, not a vendor statement
Windows 11 23H2· Microsoft
95%
v ≤ 10.0.22631.606010.0.22631.0 ≤ v < 10.0.22631.606010.0.22631.0
Affected range stops below 10.0.22631.6060, so it looks safe — our inference, not a vendor statement
Windows 11 24H2· Microsoft
95%
v < 10.0.26100.689910.0.26100.0 ≤ v < 10.0.26100.689910.0.26100.0
Affected range stops below 10.0.26100.6899, so it looks safe — our inference, not a vendor statement
Windows 11 25H2· Microsoft
95%
v < 10.0.26200.689910.0.26200.0 ≤ v < 10.0.26200.689910.0.26200.0
Affected range stops below 10.0.26200.6899, so it looks safe — our inference, not a vendor statement
Windows Server 2008· Microsoft
95%
6.0.6003.0 ≤ v < 6.0.6003.235716.1.7601.0 ≤ v < 6.1.7601.279746.0.6003.06.1.7601.0r2 sp1sp2
Affected range stops below 6.0.6003.23571, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.1.7601.27974, so it looks safe — our inference, not a vendor statement

References (4)

Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24990
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://www.vicarius.io/vsociety/posts/cve-2025-24990-detection-script-elevation-of-privilege-vulnerability-in-agere-modem-driver-affecting-windows
MitigationThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
https://www.vicarius.io/vsociety/posts/cve-2025-24990-mitigation-script-elevation-of-privilege-vulnerability-in-agere-modem-driver-affecting-windows
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-24990

SSVC — Action Prioritization

SSVCActiveNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-822

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