CVE-2026-70128 in Windows
Summary
by MITRE • 10/14/2026
Out-of-bounds read in HID Parser Library allows an authorized attacker to disclose information locally.
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Analysis
by VulDB Data Team • 10/14/2026
The vulnerability identified within the Human Interface Device (HID) Parser Library represents a critical memory safety flaw classified as an out-of-bounds read, which corresponds directly to Common Weakness Enumeration identifier CWE-125. This specific type of error occurs when software attempts to access data at a memory location that is outside the boundaries of the intended buffer or array structure. In the context of HID parsing, this typically involves the interpretation of descriptor reports sent by peripheral devices such as keyboards, mice, game controllers, or other input hardware. The parser library is responsible for translating raw binary data from these devices into structured information that operating systems and applications can utilize to process user inputs correctly. When a malformed or maliciously crafted HID report descriptor is processed, the parsing logic may miscalculate offsets or lengths due to insufficient validation of input parameters, leading it to read memory addresses beyond the allocated buffer space.
From an operational perspective, this vulnerability allows for local information disclosure by an authorized attacker who has access to the system and can interact with USB or Bluetooth HID devices. The primary risk lies in the potential leakage of sensitive data residing in adjacent memory locations that are not intended to be part of the input stream. Depending on the specific implementation details and the state of the application's memory at the time of exploitation, this could result in the exposure of cryptographic keys, session tokens, passwords, or other confidential information stored nearby in RAM. While the immediate impact is limited to reading data rather than executing arbitrary code, such leaks can serve as a precursor to more severe attacks by providing attackers with the necessary context to bypass authentication mechanisms or escalate privileges through subsequent exploitation steps.
The attack vector for this vulnerability aligns with several techniques outlined in the MITRE ATT&CK framework, particularly those related to input validation failures and memory corruption. It falls under categories such as Taint Analysis where untrusted data from external sources is not properly sanitized before being processed by sensitive functions. Furthermore, because it involves reading arbitrary memory locations, it shares characteristics with techniques used for information gathering within the local environment. The requirement for an authorized attacker implies that physical access or authenticated remote interaction with a HID device is necessary to trigger the flaw, which limits its exploitability compared to network-based vulnerabilities but makes it highly relevant in scenarios involving untrusted peripherals brought into secure environments by insiders or through social engineering tactics like USB drop attacks.
Mitigation strategies must focus on rigorous input validation and robust memory management practices within the HID parser implementation. Developers should ensure that all offsets, lengths, and indices derived from external descriptors are strictly validated against known safe bounds before any read operations are performed. Implementing static analysis tools during the software development lifecycle can help identify potential out-of-bounds access patterns early in the coding phase. Additionally, employing dynamic analysis techniques such as fuzz testing with malformed HID reports is essential to uncover edge cases where boundary checks might fail. For system administrators and end-users, limiting physical access to USB ports or using hardware-enforced port control solutions can reduce the attack surface by preventing unauthorized devices from connecting to critical systems until they have been vetted for security compliance.