CVE-2026-30795 PUBLISHED

RustDesk HTTP Client Silently Accepts Invalid TLS Certificates After Handshake Failure

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

Cleartext Transmission of Sensitive Information vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android (Heartbeat sync loop modules) allows Sniffing Attacks. This vulnerability is associated with program files src/hbbs_http/sync.Rs and program routines Heartbeat JSON payload construction (preset-address-book-password).

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

Pro server with address book password configured

Exploits

PoC available. Trivially exploitable.

Workarounds

Avoid setting address book passwords; use account-based access only

Solutions

Hash or encrypt the credential before transmission. Transition to SRP.

Credits

Erez Kalman finder
Erez Kalman reporter

References

https://github.com/rustdesk/rustdesk

Problem Types

CWE-319 Cleartext Transmission of Sensitive Information CWE

Impacts

CAPEC-157 Sniffing Attacks