CVE-2026-30789 RustDesk Auth Proof Uses Server-Controlled Salt/Challenge and Fast Double-SHA256, Enabling Offline Brute-Force

Use of Password Hash With Insufficient Computational Effort, Improper Restriction of Excessive Authentication Attempts vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android Client login, peer authentication modules allows Password Brute Forcing. T...

CVE-2026-30789

CVE-2026-30789 concerns the RustDesk Client (rustdesk-client) across Windows, macOS, Linux, iOS, and Android. It enables an authentication bypass via capture-replay and the use of a password hash with insufficient computational effort, by reusing Session IDs (session replay) in login and peer aut...