CVE-2026-30791 PUBLISHED

RustDesk Client Accepts Pseudo-Encrypted Config Strings Without Cryptographic Validation

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

Use of a Broken or Risky Cryptographic Algorithm vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android, WebClient (Config import, URI scheme handler, CLI --config modules) allows Retrieve Embedded Sensitive Data. This vulnerability is associated with program files flutter/lib/common.Dart, hbb_common/src/config.Rs and program routines parseRustdeskUri(), importConfig().

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:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS Score: 8.7

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

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 — any deployment using "Encrypted Config" strings

Exploits

PoC available. Trivially exploitable.

Workarounds

Treat config strings as public; restrict distribution to trusted channels only

Solutions

Implement AES-256-GCM AEAD or equivalent authenticated encryption

Credits

Erez Kalman finder
Erez Kalman reporter

References

https://rustdesk.com/docs/en/client/

Problem Types

CWE-327 Use of a Broken or Risky Cryptographic Algorithm CWE
CWE-684 CWE

Impacts

CAPEC-37 Retrieve Embedded Sensitive Data