VULNERABILITY INTELLIGENCE

CVE-2026-30796

CVSS score7.5 HIGH

EPSS probability0.46%

CISA KEVNot currently listed

Published2026-03-05

Last modified2026-07-19

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

Cleartext Transmission of Sensitive Information, Insufficiently Protected Credentials vulnerability in rustdesk-client RustDesk Client rustdesk-client on Windows, MacOS, Linux, iOS, Android (Address book sync, Heartbeat sync loop modules) allows Sniffing Attacks. The client places the preset address-book password verbatim into the heartbeat sync JSON body (src/hbbs_http/sync.rs). Over an intact HTTPS session it is not exposed in transit, but it is a reusable shared secret rather than a zero-knowledge proof, so it is recovered by any party that becomes the API endpoint - under the re-homed/rogue API server (CVE-2026-30797) - and the leaked credential then authorizes the server-side address book. This vulnerability is associated with program files src/hbbs_http/sync.rs and program routines heartbeat sync body builder (emits preset-address-book-password). This issue affects RustDesk Client: through 1.4.8.

Weakness classification

2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe: CWE-522

Primary references

2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe — Exploit, Third Party Advisory
2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe — Product, Vendor Advisory
2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe — Not Applicable