CVE-2026-85816 in Windows
Summary
by MITRE • 10/14/2026
Out-of-bounds read in Windows Wi-Fi Driver allows an authorized attacker to disclose information over an adjacent network.
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Analysis
by VulDB Data Team • 10/14/2026
The vulnerability described involves a critical out-of-bounds read flaw within the Microsoft Windows Wi-Fi driver stack, specifically affecting components responsible for handling wireless network communication protocols. This type of memory corruption issue arises when the software fails to properly validate input data or buffer boundaries before accessing memory locations. In this specific instance, an attacker who has already gained authorized access to a system connected to the same local area network can exploit this flaw by crafting maliciously formatted packets or triggering specific driver routines that lead to reading beyond the allocated memory buffers. The consequence of such an out-of-bounds read is typically the disclosure of sensitive information stored in adjacent memory regions, which may include kernel-mode data, credentials, encryption keys, or other proprietary system states that are not intended for public exposure.
From a technical perspective, this vulnerability aligns with Common Weakness Enumeration category CWE-125, Out-of-bounds Read, and potentially CWE-200, Exposure of Sensitive Information to an Unauthorized Actor. The attack vector is classified as adjacent network access under the MITRE ATT&CK framework, indicating that the threat actor does not require direct physical or remote internet-based access but must be on the same local subnet where the vulnerable Wi-Fi interface operates. This significantly lowers the barrier for exploitation compared to remotely exploitable vulnerabilities over the open internet, yet it remains highly dangerous in enterprise environments where lateral movement is a primary objective for adversaries who have breached perimeter defenses.
The operational impact of this vulnerability extends beyond simple data leakage. By disclosing kernel memory contents, an attacker may gather information that facilitates further privilege escalation attacks or aids in bypassing security controls such as Data Execution Prevention (DEP) and Address Space Layout Randomization (ASLR). The ability to read arbitrary memory locations can reveal the layout of system modules, making it easier for attackers to construct reliable exploit chains. Furthermore, if sensitive cryptographic material is exposed, the confidentiality of encrypted communications traversing that Wi-Fi interface could be compromised, leading to potential eavesdropping or man-in-the-middle attacks against other users on the network.
Mitigation strategies primarily involve applying the latest security updates provided by Microsoft for Windows operating systems and associated driver packages. Organizations should ensure that all endpoints connected via wireless networks are patched promptly after vendor releases become available. Additionally, implementing strict network segmentation can limit the blast radius of such vulnerabilities by isolating critical assets from general user Wi-Fi segments. Network monitoring solutions equipped with intrusion detection capabilities should be configured to flag anomalous traffic patterns consistent with memory corruption exploits or unauthorized data exfiltration attempts over local wireless links. Regular audits of driver versions and adherence to least-privilege principles for network access further reduce the risk profile associated with this class of vulnerabilities.