CVE-2026-69457 in Windows
Summary
by MITRE • 09/09/2026
Out-of-bounds read in Windows USB Driver allows an authorized attacker to disclose information locally.
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Analysis
by VulDB Data Team • 09/10/2026
The vulnerability described involves an out-of-bounds read condition within the Universal Serial Bus driver subsystem of Microsoft Windows operating systems. This specific flaw arises when the driver processes input data or hardware state changes without adequately validating memory boundaries, leading to a scenario where the system attempts to access memory locations that lie outside the intended buffer limits. While typically associated with crashes in many contexts, this particular implementation allows for an information disclosure vector rather than immediate code execution or denial of service. The root cause is classified under Common Weakness Enumeration as CWE-125, which defines out-of-bounds read errors where software reads data past the end or before the beginning of a buffer. This misstep in memory management logic permits the leakage of sensitive kernel-mode information to user-space processes if proper isolation mechanisms are bypassed by an attacker with local access privileges.
From an operational perspective, this vulnerability poses a significant risk to system integrity and confidentiality for any environment where unauthorized users might gain physical or logical access to the machine. An authorized attacker who has already obtained valid credentials on the target system can exploit this flaw to read arbitrary memory contents from the kernel space. The disclosed information may include cryptographic keys, session tokens, passwords stored in memory, or other sensitive data structures that are not intended for user-level consumption. This capability effectively undermines the security boundary between user applications and the operating system core, allowing a low-privilege account to escalate its informational reach significantly without requiring further exploitation steps such as buffer overflows or heap spraying techniques often needed for code execution vulnerabilities.
The attack vector is categorized under Local Access within the MITRE ATT&CK framework, specifically aligning with tactics related to Credential Access and Discovery. An attacker leveraging this vulnerability would likely employ techniques similar to T1003, which involves OS credential dumping, although in this case, the method relies on memory reading rather than direct API calls like LSASS access. The presence of such a flaw indicates that the USB driver stack does not sufficiently sanitize or bound-check data received from hardware devices or internal system states before processing it for user-facing operations. This lack of rigorous input validation is particularly dangerous in shared computing environments, multi-tenant systems, or any scenario where multiple users interact with the same physical machine over time.
Mitigation strategies must focus on both immediate patching and long-term architectural improvements to prevent similar memory safety issues. The primary remediation step involves applying the latest security updates provided by Microsoft for the affected Windows versions, as these patches typically include corrected bounds checking logic within the USB driver codebase. Administrators should ensure that automatic update mechanisms are enabled or manually verify system status against known vulnerability databases regularly. Beyond patching, organizations should enforce strict physical access controls to prevent unauthorized individuals from connecting malicious peripherals that might trigger specific edge cases in driver handling routines. Additionally, implementing application whitelisting and restricting local administrative privileges can limit the ability of potential attackers to execute exploit code even if they discover such vulnerabilities. Future development cycles for system drivers must prioritize memory-safe programming practices and rigorous static analysis testing to identify out-of-bounds access patterns before deployment into production environments.