Elevation of Privilege in Windows Agere Modem Driver
CVE-2025-24052 affects the third-party Agere Modem driver that ships natively with supported Windows operating systems, specifically the legacy ltmdm64.sys driver referenced by Microsoft. Supporting content describes the issue as a stack-based buffer overflow in this driver and classifies it as an elevation of privilege vulnerability. Microsoft also stated the flaw can affect all supported Windows versions even if the modem hardware is not actively being used. In response, Microsoft removed the vulnerable driver in the October cumulative update rather than continuing to support it.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
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Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A stack-based buffer overflow in legacy Windows modem/serial-related drivers; described as dangerous because the vulnerable driver’s presence on the system may be sufficient for attack even without active modem use.
Elevation of privilege vulnerability in the Agere Modem driver affecting supported Windows versions regardless of whether the modem is actively used.
A publicly disclosed vulnerability affecting the Agere Modem driver (as described in the article).
Publicly disclosed elevation of privilege vulnerability in the Agere Modem driver shipped with supported Windows versions; not yet reported exploited in the wild in the content.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.