CVE-2025-24990
HighExploitedPublic exploitWindows Agere Modem Driver Elevation of Privilege Vulnerability
Published Oct 14, 2025 · Updated Feb 26, 2026
Key Facts
Patch immediately- CVE-2025-24990 is a high-severity vulnerability (CVSS 7.8 v3.1) affecting Windows 10 1507 (Microsoft), Windows 10 1607 (Microsoft), Windows 10 1809 (Microsoft) and 22 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 14, 2025. Public exploit code is available.
- EPSS estimates a 6.4% probability of exploitation in the next 30 days.
- Fixed versions are available, including Windows 10 1507 10.0.10240.21161, Windows 10 1607 10.0.14393.8519, Windows 10 1809 10.0.17763.7919.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
6.4%
Higher than 93.5% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2025-24990 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Oct 14, 2025 | Nov 4, 2025 | Not reported |
| Industry KEV feed | Oct 14, 2025 | Nov 4, 2025 | Not reported |
| CIRCL KEV | Oct 14, 2025 | Nov 4, 2025 | Not reported |
| ENISA EUVD | Oct 14, 2025 | n/a | Not reported |
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.
Affected Products
43 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 10 1507Microsoft | See advisory | 10.0.10240.21161 |
| Windows 10 1607Microsoft | See advisory | 10.0.14393.8519 |
| Windows 10 1809Microsoft | See advisory | 10.0.17763.7919 |
| Windows 10 21h2Microsoft | See advisory | 10.0.19044.6456 |
| Windows 10 22h2Microsoft | See advisory | 10.0.19045.6456 |
Patched Releases
Windows 10 1507
10.0.10240.21161
Windows 10 1607
10.0.14393.8519
Windows 10 1809
10.0.17763.7919
Windows 10 21h2
10.0.19044.6456
Windows 10 22h2
10.0.19045.6456
Windows 11 22h2
10.0.22621.6060
Windows 11 23h2
<=10.0.22631.6060
Windows 11 24h2
10.0.26100.6899
Windows 11 25h2
10.0.26200.6899
Windows Server 2016
<=10.0.14393.8519, 10.0.14393.8519
Windows Server 2019
10.0.17763.7919
Windows Server 2022
10.0.20348.4294
Windows Server 2022 23h2
10.0.25398.1913
Windows Server 2025
<=10.0.26100.6899, 10.0.26100.6899
Windows 10 Version 1507
10.0.10240.21161
Windows 10 Version 1607
10.0.14393.8519
Windows 10 Version 1809
10.0.17763.7919
Windows 10 Version 21H2
10.0.19044.6456
Windows 10 Version 22H2
10.0.19045.6456
Windows 11 version 22H2
10.0.22621.6060
Windows 11 Version 23H2
10.0.22631.6060
Windows 11 Version 24H2
10.0.26100.6899
Windows 11 Version 25H2
10.0.26200.6899
Windows Server 2008 R2 Service Pack 1
6.1.7601.27974
Windows Server 2008 R2 Service Pack 1 (Server Core installation)
6.1.7601.27974
Timeline
Publicly disclosed
Oct 14, 2025
Added to CISA KEV
Oct 14, 2025
Added to Industry KEV feed
Oct 14, 2025
Added to CIRCL KEV
Oct 14, 2025
Added to ENISA EUVD
Oct 14, 2025
Last updated
Feb 26, 2026
Weakness Type
- CWE-822 Untrusted Pointer Dereference
References
- advisoryWindows Agere Modem Driver Elevation of Privilege Vulnerability
- advisoryhttps://www.vicarius.io/vsociety/posts/cve-2025-24990-detection-script-elevation-of-privilege-vulnerability-in-agere-modem-driver-affecting-windows
- advisoryhttps://www.vicarius.io/vsociety/posts/cve-2025-24990-mitigation-script-elevation-of-privilege-vulnerability-in-agere-modem-driver-affecting-windows
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
Microsoft is aware of vulnerabilities in the third party Agere Modem driver that ships natively with supported Windows operating systems.
Affected: Windows 10 1507 (Microsoft); Windows 10 1607 (Microsoft); Windows 10 1809 (Microsoft), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 14, 2025.
Yes. It was added on Oct 14, 2025 with a federal remediation due date of Nov 4, 2025.
Public exploit code is available.
Fixed versions are available, including Windows 10 1507 10.0.10240.21161, Windows 10 1607 10.0.14393.8519, Windows 10 1809 10.0.17763.7919.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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