
Meta Muse AI Assistant Vulnerability Exposes Critical Backdoor Risk in 2026
In September 2026, security researcher Patrick Wardle discovered a critical vulnerability in Meta's Muse AI assistant for macOS that allows attackers with existing system access to hijack the assistant and turn it into a backdoor. The flaw exploits an undocumented setting called 'endo_voyager_dictation_endpoint' that redirects voice dictation to attacker-controlled servers, enabling theft of authentication tokens, interception of user commands, and unauthorized access across all connected devices and services. Since Muse operates with broad permissions across files, email, calendar, and smart home systems, compromised instances provide attackers extensive access while appearing as legitimate application activity to security tools. This incident highlights the emerging security risks of AI assistants with extensive system permissions and cross-device synchronization capabilities. As organizations increasingly adopt AI agents for productivity and automation, the potential for these tools to become high-value attack vectors represents a significant shift in the threat landscape requiring new security considerations.
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