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CVE-2025-24052 is a high-severity elevation of privilege vulnerability in the third-party Agere Modem driver that ships natively with supported Windows operating systems. Available reporting describes the flaw as a stack-based buffer overflow in the legacy Agere modem driver component removed by Microsoft in the October 2025 cumulative update. The vulnerability is notable because exploitation is possible based on the presence of the vulnerable driver on the system and does not require the associated modem hardware to be actively in use. Successful exploitation can result in privilege escalation on the affected Windows host.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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.
15 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.
A high-severity Windows native driver vulnerability affecting Agere Modem devices that enables privilege escalation to administrator level.
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).
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.