CVE-2026-50326 in Windows
Summary
by MITRE • 07/14/2026
Use after free in Windows Unified Consent System allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 07/15/2026
The vulnerability under discussion represents a use-after-free condition within the Windows Unified Consent System, a component designed to manage user consent for various system operations and applications. This flaw exists in the way the system handles memory management during consent processing operations, creating a scenario where freed memory blocks can be accessed and potentially manipulated by malicious code. The issue specifically affects the Windows operating system's unified consent framework that governs how applications and system components request user approval for accessing resources or performing actions that require elevated permissions.
The technical exploitation of this vulnerability requires an attacker to first establish a foothold on the target system with standard user privileges, as the flaw does not permit remote code execution but rather local privilege escalation. The use-after-free condition occurs when the Unified Consent System allocates memory for consent dialog structures and subsequently frees that memory while still maintaining references to it. An attacker can manipulate the system into triggering this memory management error by crafting specific consent requests or by exploiting the interaction between different system components during the consent process. This creates a scenario where malicious code can overwrite the freed memory with controlled data, potentially leading to arbitrary code execution within the context of higher-privileged processes.
The operational impact of this vulnerability extends beyond simple privilege escalation as it provides attackers with a reliable method to gain elevated system access without requiring sophisticated exploitation techniques or additional attack vectors. Once successfully exploited, the attacker can execute code with SYSTEM privileges, enabling them to modify critical system files, install persistent backdoors, or access sensitive user data. The vulnerability affects multiple Windows versions and is particularly concerning because it operates within the core consent framework that is invoked during normal system operations, making detection more challenging. The attack surface is broad as any application or system component that interacts with the Unified Consent System could potentially be leveraged for exploitation.
Mitigation strategies should focus on immediate patch deployment through Microsoft's regular security updates, as this vulnerability requires a system-level fix to address the underlying memory management flaw in the consent system. Organizations should also implement additional monitoring and logging around consent-related activities to detect anomalous behavior that might indicate exploitation attempts. The vulnerability aligns with CWE-416 which specifically addresses use-after-free errors, and can be mapped to ATT&CK technique T1068 which covers local privilege escalation through system binary manipulation. Security teams should also consider implementing application whitelisting policies to limit the execution of unauthorized code that might attempt to exploit this vulnerability, while maintaining proper network segmentation to prevent lateral movement once initial access is gained.