CVE-2026-62722 in Windows
Summary
by MITRE • 08/11/2026
Heap-based buffer overflow in Windows Bind Filter Driver allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 08/11/2026
This vulnerability exists within the Windows Bind Filter Driver component that handles network binding operations for various networking protocols. The heap-based buffer overflow occurs when the driver processes specially crafted input data during network binding operations, specifically when handling certain protocol identifiers or binding strings. The flaw arises from insufficient bounds checking in memory allocation routines where the driver fails to validate the length of incoming data before copying it into fixed-size heap buffers. This type of vulnerability falls under CWE-122 Heap-based Buffer Overflow, which represents one of the most common and dangerous classes of memory corruption vulnerabilities. Attackers with local user privileges can exploit this weakness by crafting malicious binding requests that trigger the overflow condition, potentially allowing them to execute arbitrary code with kernel-level privileges through privilege escalation techniques.
The operational impact of this vulnerability extends beyond simple local privilege escalation as it represents a critical security gap in Windows networking stack defenses. When successfully exploited, the vulnerability enables attackers to gain SYSTEM level access on vulnerable systems, providing complete control over network communications and potentially allowing lateral movement within network environments. The attack surface is particularly concerning because the Bind Filter Driver operates at a low system level and handles numerous network binding operations that occur during normal system operation. This makes exploitation more likely in real-world scenarios where users perform routine networking tasks or applications establish network connections. The vulnerability demonstrates characteristics consistent with ATT&CK technique T1068, which involves local privilege escalation through kernel exploits.
Mitigation strategies for this vulnerability should focus on immediate patch management and system hardening measures. Microsoft has released security updates addressing this specific heap-based buffer overflow in affected Windows versions, making timely patch deployment the primary recommendation. System administrators should also implement network segmentation and access controls to limit potential exploitation pathways, while monitoring for anomalous network binding operations that might indicate attempted exploitation. Additional defensive measures include enabling kernel-mode exploit protection features such as Data Execution Prevention and Address Space Layout Randomization to make successful exploitation more difficult. The vulnerability highlights the importance of secure coding practices in kernel-level drivers, particularly around memory management and input validation, which should be enforced through code review processes and automated static analysis tools to prevent similar issues in future development cycles.