Overview
CVE-2025-47996 is a security vulnerability that affects the Windows MBT (Mobile Broadband Transport) Transport Driver. As a result of an integer underflow, an authorized attacker can exploit this vulnerability to escalate privileges locally. This potential breach in security is of critical concern to both individual users and organizations that rely on Windows systems, as it may lead to unauthorized system access, potential system compromise, or data leakage.
Vulnerability Summary
CVE ID: CVE-2025-47996
Severity: High (7.8 CVSS v3 Score)
Attack Vector: Local
Privileges Required: Low
User Interaction: Required
Impact: Privilege escalation, potential system compromise, or data leakage
Affected Products
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Product | Affected Versions
Windows OS | All versions up to the latest patch
How the Exploit Works
This vulnerability exploits an integer underflow in the Windows MBT Transport driver. An integer underflow happens when an operation causes a number to drop below its valid range. In this case, the vulnerability can be triggered when an attacker manipulates the Windows MBT Transport driver to consume more resources than it is allocated. This causes the integer underflow, which can then be exploited to execute arbitrary code with elevated privileges.
Conceptual Example Code
This conceptual example demonstrates how an attacker might manipulate a system call to trigger the integer underflow.
# Arbitrary system call that interacts with the MBT Transport Driver
syscall(“MBT_Transport_Driver”, “-999999999”)In this example, the syscall function is called with parameters that are likely to cause an integer underflow in the MBT Transport Driver. This is a conceptual example and the actual exploit may involve more complex manipulations.
Recommendations for Mitigation
Microsoft has released a patch to address this vulnerability. Affected users are advised to apply the patch as soon as possible. If immediate patching is not feasible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. These systems can detect and block attempts to exploit this vulnerability. However, these are only temporary solutions and will not provide full protection. Patching the system is the only way to ensure full mitigation of this vulnerability.