CVE-2026-50351 in Windows
Summary
by MITRE • 07/14/2026
Improper access control in Windows Audio Compression Manager (ACM) allows an authorized attacker to elevate privileges locally.
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Analysis
by VulDB Data Team • 07/14/2026
The vulnerability resides within the Windows Audio Compression Manager component which handles audio codec operations and manages multimedia data processing. This issue represents a privilege escalation flaw that affects the core audio subsystem of windows operating systems. The improper access control mechanism allows an authenticated user to exploit weaknesses in the ACM service's permission model, potentially enabling them to execute arbitrary code with elevated privileges. The vulnerability specifically impacts systems where the audio compression manager is actively utilized for codec operations and multimedia processing tasks.
The technical flaw manifests through insufficient validation of access permissions within the ACM framework that governs how audio compression and decompression operations are handled. Attackers can leverage this weakness by crafting specific audio data or manipulation sequences that bypass normal permission boundaries. The vulnerability stems from inadequate sandboxing mechanisms and missing privilege checks during audio processing operations, creating an attack surface where standard user privileges can be leveraged to gain elevated system access. This represents a classic case of insufficient authorization controls that violates fundamental security principles governing privileged operations.
Operationally this vulnerability presents significant risks to enterprise environments as it allows local attackers with minimal privileges to potentially escalate their access level and execute malicious code at higher privilege levels. The impact extends beyond simple privilege escalation as compromised audio processing services could provide persistent access to system resources, enabling further exploitation or data exfiltration activities. Organizations running multimedia applications that rely on ACM for audio processing are particularly vulnerable since these components are frequently active in production environments. The attack vector requires local access but does not need network exposure, making it particularly dangerous in environments where insider threats exist.
Mitigation strategies should prioritize immediate patching of affected systems through Microsoft security updates and implementing least privilege principles for audio processing services. System administrators must configure proper access controls and monitor audio compression manager activities for anomalous behavior patterns. The implementation of application whitelisting policies can help prevent exploitation by limiting which audio processing components can be executed. Additionally, regular security assessments should verify that ACM services are properly isolated and that appropriate user permissions are enforced. Organizations should also consider network segmentation to limit potential lateral movement if exploitation occurs, while maintaining detailed logging of audio processing activities for forensic analysis purposes. This vulnerability aligns with CWE-284 which addresses improper access control issues, and represents a potential entry point for techniques categorized under privilege escalation in the MITRE ATT&CK framework.