CVE-2026-30796 PUBLISHED

RustDesk Server Pro API Requires Address Book Password in Plaintext for Sync Protocol

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

Cleartext Transmission of Sensitive Information vulnerability in rustdesk-server-pro RustDesk Server Pro rustdesk-server-pro on Windows, MacOS, Linux (Address book sync API modules) allows Sniffing Attacks. This vulnerability is associated with program files Closed source — API endpoint handling heartbeat sync and program routines Heartbeat API handler (accepts preset-address-book-password in plaintext).

This issue affects RustDesk Server Pro: through 1.7.5.

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-server-pro
Product	RustDesk Server Pro
Versions	Default: affected affected from 0 to 1.7.5 (incl.)

Affected Configurations

Pro server with address book feature in use

Exploits

PoC available. Trivially exploitable.

Workarounds

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

Solutions

Transition Address Book API to SRP (Secure Remote Password)

Credits

Erez Kalman finder
Erez Kalman reporter

References

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

Problem Types

CWE-319 Cleartext Transmission of Sensitive Information CWE

Impacts

CAPEC-157 Sniffing Attacks