CVE-2025-24990 | Windows Agere Modem Driver Elevation of Privilege Vulnerability

Exp

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.

Published: 2025-10-14 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]

NVD Status：Analyzed，CVE State: published

View at NVD, CVE.org, EUVD

Threat Intelligence & Risk Assessment for CVE-2025-24990

KEV EPSS CVSS CWE Affected

Conclusion & alert: CVE-2025-24990 is rated Critical Active Threat (91.5/100): CVSS High severity, with high exploitation likelihood (EPSS 5.79%, 92th percentile). Core evidence: CISA KEV confirms active exploitation (added 2025-10-14) affecting Microsoft / Windows. a weakness (CWE-822) Unauthenticated remote administrative access may be possible. EPSS rose +3.03% over the last day, indicating growing attacker interest. Mandatory action: The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2025-24990

Name: Microsoft Windows Untrusted Pointer Dereference Vulnerability · CISA KEV detail

Exploit added: 2025-10-14

Action 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.

Exploit prediction scoring system (EPSS) score for CVE-2025-24990

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	2.76%	5.79%	+3.03%
2	2026-04-21	3.90%	2.76%	-1.13%
3	2026-03-27	—	3.90%	—

Full EPSS history (29 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-24990

CVSS metrics for this CVE.

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.8	3.1	HIGH	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	5.9	[email protected]

Weakness enumeration for CVE-2025-24990

CWE-822 MITRE ↗

Affected software / configurations for CVE-2025-24990

Vendor	Product	Version	Raw CPE
microsoft	windows_10_1507	< 10.0.10240.21161	cpe:2.3:o:microsoft:windows_10_1507:::::::x64:*
microsoft	windows_10_1607	< 10.0.14393.8519	cpe:2.3:o:microsoft:windows_10_1607:::::::x64:*
microsoft	windows_10_1809	< 10.0.17763.7919	cpe:2.3:o:microsoft:windows_10_1809:::::::x64:*
microsoft	windows_10_21h2	< 10.0.19044.6456	cpe:2.3:o:microsoft:windows_10_21h2:::::::x64:*
microsoft	windows_10_22h2	< 10.0.19045.6456	cpe:2.3:o:microsoft:windows_10_22h2:::::::x64:*
microsoft	windows_11_22h2	< 10.0.22621.6060	cpe:2.3:o:microsoft:windows_11_22h2:::::::x64:*
microsoft	windows_11_23h2	<= 10.0.22631.6060	cpe:2.3:o:microsoft:windows_11_23h2:::::::x64:*
microsoft	windows_11_24h2	< 10.0.26100.6899	cpe:2.3:o:microsoft:windows_11_24h2:::::::x64:*
microsoft	windows_11_25h2	< 10.0.26200.6899	cpe:2.3:o:microsoft:windows_11_25h2:::::::x64:*
microsoft	windows_server_2008	—	cpe:2.3:o:microsoft:windows_server_2008:-:sp2:::::x64:*
microsoft	windows_server_2008	r2	cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:::::x64:*
microsoft	windows_server_2012	—	cpe:2.3:o:microsoft:windows_server_2012:-:::::::*
microsoft	windows_server_2012	r2	cpe:2.3:o:microsoft:windows_server_2012:r2:::::::*
microsoft	windows_server_2016	<= 10.0.14393.8519	cpe:2.3:o:microsoft:windows_server_2016::::::::
microsoft	windows_server_2019	< 10.0.17763.7919	cpe:2.3:o:microsoft:windows_server_2019::::::::
microsoft	windows_server_2022	< 10.0.20348.4294	cpe:2.3:o:microsoft:windows_server_2022::::::::
microsoft	windows_server_2022_23h2	< 10.0.25398.1913	cpe:2.3:o:microsoft:windows_server_2022_23h2::::::::
microsoft	windows_server_2025	<= 10.0.26100.6899	cpe:2.3:o:microsoft:windows_server_2025::::::::

References for CVE-2025-24990

URL	Tags
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

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