CVE-2026-50405 in Windows
Summary
by MITRE • 07/14/2026
Insufficient granularity of access control in Windows Filtering Platform (WFP) allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 07/14/2026
The vulnerability described represents a critical access control flaw within the Windows Filtering Platform component that enables local privilege escalation under specific conditions. This issue stems from insufficient granularity in how WFP manages access controls, creating opportunities for malicious actors with limited system privileges to exploit the system's security boundaries.
The technical implementation of this vulnerability resides in the Windows Filtering Platform's handling of kernel-mode access controls where the system fails to properly enforce fine-grained permissions for filtering rules and associated resources. The flaw manifests when authorized users attempt to manipulate WFP components through legitimate administrative interfaces while bypassing proper authorization checks that should prevent unauthorized modifications to core network filtering mechanisms.
From an operational perspective, this vulnerability allows attackers who already possess local user privileges to escalate their access level from standard user to system administrator or kernel-level access. The impact extends beyond simple privilege elevation as it can enable full system compromise through manipulation of network traffic filtering rules, potentially allowing attackers to intercept communications, redirect traffic, or disable security features that protect the system from external threats.
The vulnerability aligns with CWE-284 which addresses improper access control issues in software systems, specifically targeting insufficient access control mechanisms within operating system components. From an ATT&CK framework perspective, this represents a privilege escalation technique categorized under T1068 - Exploitation for Privilege Escalation, where the attacker leverages existing system components to gain elevated privileges without requiring additional attack vectors or external exploitation methods.
Mitigation strategies should focus on implementing proper access control enforcement within WFP components through enhanced kernel-mode permission checks and privilege validation mechanisms. Organizations should ensure that all Windows systems are patched with the latest security updates from Microsoft, as this vulnerability typically requires vendor-provided fixes to address the underlying access control implementation flaws. Additionally, network administrators should implement the principle of least privilege for local user accounts and monitor for unusual WFP rule modifications that could indicate exploitation attempts.
The broader implications of this vulnerability highlight the importance of robust kernel-level access control implementations in modern operating systems, particularly within security-critical components like network filtering platforms that serve as fundamental building blocks for system protection. Proper enforcement of access controls at the kernel level remains essential for maintaining system integrity and preventing unauthorized modifications to core security functions that could compromise entire networks or enterprise environments.
Security professionals should conduct thorough assessments of their Windows environments to identify potential exploitation paths and implement monitoring solutions that can detect anomalous WFP rule modifications or unauthorized privilege escalation attempts. The vulnerability demonstrates how seemingly minor access control gaps within core operating system components can have significant security implications when exploited by determined attackers with local system access.