How severe is CVE-2025-24990?

CVE-2025-24990 has a CVSS score of 7.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2025-24990?

Affected package information for CVE-2025-24990 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2025-24990?

No fixed version has been published for CVE-2025-24990 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2025-24990 actively exploited in the wild?

No public exploit code has been indexed for CVE-2025-24990 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2025-24990?

CVE-2025-24990 has an EPSS (Exploit Prediction Scoring System) score of 2.8%, placing it in the 86th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

Is CVE-2025-24990 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2025-24990 (Microsoft Windows Untrusted Pointer Dereference Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2025-10-14. CISA required all US federal civilian agencies to remediate this vulnerability by 2025-11-04. The required action was: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2025-24990?

CVE-2025-24990 is classified as CWE-822 (CWE-822). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Which products and versions are affected by CVE-2025-24990?

CVE-2025-24990 affects microsoft windows 10 21h2; microsoft windows 10 22h2; microsoft windows 10 1507; microsoft windows 10 1607, and 12 more product(s). Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2025-24990 published, and has it been updated?

CVE-2025-24990 was published on October 14, 2025 and was last updated on November 18, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-2025-24990: Windows 10 21h2 CWE-822 (High 7.8)

EPSS Exploitation Probability

via FIRST.org ↗

2.8%probability of exploitation in next 30 days

Lower Risk86th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

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 Products

16 products · 18 configurations

OS

windows 10 21h2microsoft

< 10.0.19044.6456

range

OS

windows 10 22h2microsoft

< 10.0.19045.6456

range

OS

windows 10 1507microsoft

< 10.0.10240.21161

range

OS

windows 10 1607microsoft

< 10.0.14393.8519

range

OS

windows 10 1809microsoft

< 10.0.17763.7919

range

OS

windows 11 22h2microsoft

< 10.0.22621.6060

range

Frequently Asked Questions

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.

O3 Security · Impact-Aware SCA

Is CVE-2025-24990 in your stack?

O3 detects CVE-2025-24990 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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