---
id: "CVE-2025-24990"
kind: "vulnerability"
aliases: ["CVE-2025-24990"]
title: "Microsoft is aware of vulnerabilities in the third party Agere Modem driver that ships natively with supported\u2026"
severity: "high"
cvss: 7.8
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Microsoft Windows", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1507", "fixed": ["10.0.10240.21161"], "affected": "< 10.0.10240.21161", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1607", "fixed": ["10.0.14393.8519"], "affected": "< 10.0.14393.8519", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1809", "fixed": ["10.0.17763.7919"], "affected": "< 10.0.17763.7919", "ecosystem": "vendor"}, {"name": "microsoft windows 10 21h2", "fixed": ["10.0.19044.6456"], "affected": "< 10.0.19044.6456", "ecosystem": "vendor"}, {"name": "microsoft windows 10 22h2", "fixed": ["10.0.19045.6456"], "affected": "< 10.0.19045.6456", "ecosystem": "vendor"}, {"name": "microsoft windows 11 22h2", "fixed": ["10.0.22621.6060"], "affected": "< 10.0.22621.6060", "ecosystem": "vendor"}, {"name": "microsoft windows 11 23h2", "fixed": [], "affected": "<= 10.0.22631.6060", "ecosystem": "vendor"}, {"name": "microsoft windows 11 24h2", "fixed": ["10.0.26100.6899"], "affected": "< 10.0.26100.6899", "ecosystem": "vendor"}, {"name": "microsoft windows 11 25h2", "fixed": ["10.0.26200.6899"], "affected": "< 10.0.26200.6899", "ecosystem": "vendor"}, {"name": "microsoft windows server 2008", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows server 2008", "fixed": [], "affected": "= r2", "ecosystem": "vendor"}, {"name": "microsoft windows server 2012", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows server 2012", "fixed": [], "affected": "= r2", "ecosystem": "vendor"}, {"name": "microsoft windows server 2016", "fixed": [], "affected": "<= 10.0.14393.8519", "ecosystem": "vendor"}, {"name": "microsoft windows server 2019", "fixed": ["10.0.17763.7919"], "affected": "< 10.0.17763.7919", "ecosystem": "vendor"}, {"name": "microsoft windows server 2022", "fixed": ["10.0.20348.4294"], "affected": "< 10.0.20348.4294", "ecosystem": "vendor"}, {"name": "microsoft windows server 2022 23h2", "fixed": ["10.0.25398.1913"], "affected": "< 10.0.25398.1913", "ecosystem": "vendor"}, {"name": "microsoft windows server 2025", "fixed": [], "affected": "<= 10.0.26100.6899", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "self-hosted", "windows"]
not_affected_if: ["no-agere-modem-driver"]
published_at: "2025-10-14T00:00:00+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T23:44:51+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-24990", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-24990", "first_seen_at": "2026-10-23T23:44:51+00:00"}]
---

# Microsoft is aware of vulnerabilities in the third party Agere Modem driver that ships natively with supported…

A flaw in the Agere modem driver shipped with Microsoft Windows lets a local user run a pointer dereference that escalates privileges. A successful attacker gets administrator rights on the machine, and CISA lists it as exploited in the wild.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Microsoft Windows affected ? fixed ?
- vendor:microsoft windows 10 1507 affected < 10.0.10240.21161 fixed 10.0.10240.21161
- vendor:microsoft windows 10 1607 affected < 10.0.14393.8519 fixed 10.0.14393.8519
- vendor:microsoft windows 10 1809 affected < 10.0.17763.7919 fixed 10.0.17763.7919
- vendor:microsoft windows 10 21h2 affected < 10.0.19044.6456 fixed 10.0.19044.6456
- vendor:microsoft windows 10 22h2 affected < 10.0.19045.6456 fixed 10.0.19045.6456
- vendor:microsoft windows 11 22h2 affected < 10.0.22621.6060 fixed 10.0.22621.6060
- vendor:microsoft windows 11 23h2 affected <= 10.0.22631.6060 fixed ?
- vendor:microsoft windows 11 24h2 affected < 10.0.26100.6899 fixed 10.0.26100.6899
- vendor:microsoft windows 11 25h2 affected < 10.0.26200.6899 fixed 10.0.26200.6899
- vendor:microsoft windows server 2008 affected ? fixed ?
- vendor:microsoft windows server 2008 affected = r2 fixed ?
- vendor:microsoft windows server 2012 affected ? fixed ?
- vendor:microsoft windows server 2012 affected = r2 fixed ?
- vendor:microsoft windows server 2016 affected <= 10.0.14393.8519 fixed ?
- vendor:microsoft windows server 2019 affected < 10.0.17763.7919 fixed 10.0.17763.7919
- vendor:microsoft windows server 2022 affected < 10.0.20348.4294 fixed 10.0.20348.4294
- vendor:microsoft windows server 2022 23h2 affected < 10.0.25398.1913 fixed 10.0.25398.1913
- vendor:microsoft windows server 2025 affected <= 10.0.26100.6899 fixed ?

## Fix

Apply the Microsoft update or mitigation for CVE-2025-24990 per vendor instructions; if none is available, stop using the affected driver or product as CISA directs.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-24990
- 2026-10-23T23:44:51+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2025-24990

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_