CVEs / CVE-2025-24990
CVE-2025-24990: Microsoft Windows Untrusted Pointer Dereference Vulnerability
- Known exploited in the CISA KEV catalog since 14 Oct 2025
- high 7.8 CVSS 3.1 (from the CNA)
- EPSS 6.36% chance of exploitation in the next 30 days, higher than 93% of CVEs (30 Oct 2026)
- Last changed at its sources
Are you affected? Check your servers with Stackurity: it lists the software on each server and the vulnerabilities to fix first.
Check your servers with Stackurity Already using Stackurity? Search for CVE-2025-24990
Summary
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.
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 and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Windows 10 Version 1507 | from 10.0.10240.0, before 10.0.10240.21161 | 10.0.10240.21161 |
| Microsoft Windows 10 Version 1607 | from 10.0.14393.0, before 10.0.14393.8519 | 10.0.14393.8519 |
| Microsoft Windows 10 Version 1809 | from 10.0.17763.0, before 10.0.17763.7919 | 10.0.17763.7919 |
| Microsoft Windows 10 Version 21H2 | from 10.0.19044.0, before 10.0.19044.6456 | 10.0.19044.6456 |
| Microsoft Windows 10 Version 22H2 | from 10.0.19045.0, before 10.0.19045.6456 | 10.0.19045.6456 |
| Microsoft Windows 11 version 22H2 | from 10.0.22621.0, before 10.0.22621.6060 | 10.0.22621.6060 |
| Microsoft Windows 11 Version 23H2 | from 10.0.22631.0, before 10.0.22631.6060 | 10.0.22631.6060 |
| Microsoft Windows 11 Version 24H2 | from 10.0.26100.0, before 10.0.26100.6899 | 10.0.26100.6899 |
| Microsoft Windows 11 Version 25H2 | from 10.0.26200.0, before 10.0.26200.6899 | 10.0.26200.6899 |
| Microsoft Windows Server 2008 R2 Service Pack 1 | from 6.1.7601.0, before 6.1.7601.27974 | 6.1.7601.27974 |
| Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) | from 6.1.7601.0, before 6.1.7601.27974 | 6.1.7601.27974 |
| Microsoft Windows Server 2008 Service Pack 2 | from 6.0.6003.0, before 6.0.6003.23571 | 6.0.6003.23571 |
| Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) | from 6.0.6003.0, before 6.0.6003.23571 | 6.0.6003.23571 |
| Microsoft Windows Server 2012 | from 6.2.9200.0, before 6.2.9200.25722 | 6.2.9200.25722 |
| Microsoft Windows Server 2012 (Server Core installation) | from 6.2.9200.0, before 6.2.9200.25722 | 6.2.9200.25722 |
| Microsoft Windows Server 2012 R2 | from 6.3.9600.0, before 6.3.9600.22824 | 6.3.9600.22824 |
| Microsoft Windows Server 2012 R2 (Server Core installation) | from 6.3.9600.0, before 6.3.9600.22824 | 6.3.9600.22824 |
| Microsoft Windows Server 2016 | from 10.0.14393.0, before 10.0.14393.8519 | 10.0.14393.8519 |
| Microsoft Windows Server 2016 (Server Core installation) | from 10.0.14393.0, before 10.0.14393.8519 | 10.0.14393.8519 |
| Microsoft Windows Server 2019 | from 10.0.17763.0, before 10.0.17763.7919 | 10.0.17763.7919 |
| Microsoft Windows Server 2019 (Server Core installation) | from 10.0.17763.0, before 10.0.17763.7919 | 10.0.17763.7919 |
| Microsoft Windows Server 2022 | from 10.0.20348.0, before 10.0.20348.4294 | 10.0.20348.4294 |
| Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) | from 10.0.25398.0, before 10.0.25398.1913 | 10.0.25398.1913 |
| Microsoft Windows Server 2025 | from 10.0.26100.0, before 10.0.26100.6899 | 10.0.26100.6899 |
| Microsoft Windows Server 2025 (Server Core installation) | from 10.0.26100.0, before 10.0.26100.6899 | 10.0.26100.6899 |
Exploitation
| In CISA KEV since | 14 Oct 2025 |
|---|---|
| Due date for US federal agencies | 4 Nov 2025 |
| Used in ransomware campaigns | Unknown |
| 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. |
Severity
| CVSS 3.1 | 7.8 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HScored by the CNA ([email protected]) |
|---|---|
| Weakness | CWE-822 |
References
- CVE-2025-24990 on NVD
- CVE-2025-24990 in the CISA KEV catalog
- https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-24990 (cited by CISA)
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24990 Vendor Advisory
- https://www.vicarius.io/vsociety/posts/cve-2025-24990-detection-script-elevation-of-privilege-vulnerability-in-agere-modem-driver-affecting-windows Third Party Advisory
- https://www.vicarius.io/vsociety/posts/cve-2025-24990-mitigation-script-elevation-of-privilege-vulnerability-in-agere-modem-driver-affecting-windows Mitigation, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-24990 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.