CVE-2026-57850
RustDesk before 1.4.9 does not enforce a session's authorized connection scope on the server side, so a peer granted a limited session type (FileTransfer, PortForward, ViewCamera, or Terminal) can send control messages and login options reserved for a full Remote session. An authenticated remote peer can exploit this missing scope check to act outside its granted scope, injecting out-of-scope control messages to observe and control the host beyond the permissions it was given.
Weakness
RustDesk before 1.4.9 does not enforce a session's authorized connection scope on the server side, so a peer granted a limited session type (FileTransfer, PortForward, ViewCamera, or Terminal) can send control messages and login options reserved for a full Remote session. An authenticated remote peer can exploit this missing scope check to act outside its granted scope, injecting out-of-scope control messages to observe and control the host beyond the permissions it was given.
References
- https://github.com/rustdesk/rustdesk
- https://github.com/rustdesk/rustdesk/commit/493b14ba78abc3dfb33f109c7f93c1c95a1dabc4
- https://github.com/rustdesk/rustdesk/pull/15469
- https://github.com/rustdesk/rustdesk/releases/tag/1.4.9
- https://github.com/sn0x-sharma/CVE-2026-57850
- https://www.vulncheck.com/advisories/rustdesk-missing-session-scope-enforcement-allows-out-of-scope-control-message-injection
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