CVE-2026-70299 in Windows
Summary
by MITRE • 10/14/2026
Improper access control in Windows Bind Filter Driver allows an authorized attacker to elevate privileges locally.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 10/14/2026
The vulnerability identified as improper access control within the Windows Bind Filter Driver represents a critical flaw in how the operating system manages permissions for kernel-mode drivers and their associated resources. This specific component of the Windows networking stack is responsible for binding network protocol stacks to underlying transport providers, facilitating communication between applications and hardware interfaces. The core technical issue stems from an insufficient validation mechanism when handling access requests directed at objects managed by this driver. Specifically, the flaw allows a process that has already been authenticated and granted basic user-level privileges on the local system to interact with sensitive kernel structures or memory regions in ways that bypass intended security restrictions. This misconfiguration effectively creates a gap where standard discretionary access control lists are either ignored or incorrectly evaluated during specific operations involving network binding contexts.
From an operational perspective, this vulnerability enables privilege escalation from a low-privileged user account to the highly privileged SYSTEM level. An attacker who gains initial foothold on a vulnerable system can exploit this flaw by crafting malicious requests that trigger the improper access control logic within the Bind Filter Driver. By doing so, they can execute arbitrary code in kernel mode or manipulate critical security tokens associated with the current process. This elevation of privilege is particularly dangerous because it allows the attacker to bypass user account control mechanisms and gain full administrative rights over the compromised machine without requiring additional exploits or social engineering tactics beyond initial access. The impact extends beyond simple data theft, as a SYSTEM-level compromise provides unrestricted ability to install software, view, change, or delete any file on the system, and create new accounts with full admin privileges.
In terms of industry classification standards, this vulnerability aligns closely with CWE-269, which denotes Improper Privilege Management. The failure lies in the driver's inability to correctly enforce privilege boundaries during specific API calls related to network binding operations. Furthermore, from a tactical standpoint within the MITRE ATT&CK framework, this flaw facilitates techniques associated with T1055, specifically Process Injection or T1068, Exploitation for Privilege Escalation. Attackers would typically leverage this vulnerability after achieving initial access through other means such as phishing or unpatched service vulnerabilities to solidify their position within the network and move laterally across systems that rely on similar Windows configurations.
Mitigation strategies primarily involve applying the latest security updates provided by Microsoft, which patch the underlying logic errors in the Bind Filter Driver's access control checks. Organizations should prioritize deploying these patches via automated update mechanisms or through enterprise deployment tools to ensure rapid remediation across all endpoints. Additionally, implementing strict application whitelisting and restricting script execution can limit an attacker's ability to execute the exploit code required to trigger this vulnerability. Network segmentation also plays a crucial role in limiting the blast radius if such a compromise occurs, ensuring that elevated privileges on one machine do not automatically translate into unrestricted access across the entire infrastructure. Regular auditing of driver installations and monitoring for unusual kernel-mode activity can further enhance detection capabilities against attempts to exploit this specific flaw.