CVE-2026-30793 PUBLISHED

RustDesk Flutter URI Handler Sets Permanent Password Without Privilege Check or User Confirmation

Assigner: VULSec
Reserved: 05.03.2026 Published: 05.03.2026 Updated: 05.03.2026

Cross-Site Request Forgery (CSRF) vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android (Flutter URI scheme handler, FFI bridge modules) allows Privilege Escalation. This vulnerability is associated with program files flutter/lib/common.Dart, src/flutter_ffi.Rs and program routines URI handler for rustdesk://password/, bind.MainSetPermanentPassword().

This issue affects RustDesk Client: through 1.4.5.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	rustdesk-client
Product	RustDesk Client
Versions	Default: affected affected from 0 to 1.4.5 (incl.)

Affected Configurations

Default — RustDesk installed with URI scheme handler registered

Exploits

PoC available. Trivially exploitable.

Workarounds

Unregister the rustdesk:// URI scheme handler at OS level

Solutions

Synchronize privilege logic between CLI and GUI. Require user confirmation. Add config to disable.

Credits

Erez Kalman finder
Erez Kalman reporter

References

Problem Types

CWE-285 CWE
CWE-352 Cross-Site Request Forgery (CSRF) CWE

Impacts

CAPEC-233 Privilege Escalation