Vulnerability in Apple macOS
CVE-2026-30796
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.
EPSS: 0.004 (33.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
Weakness classification (CWE)
References
- 2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe (x_--config documentation, Product, technical-description, Vendor Advisory)
- 2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe (Exploit, Third Party Advisory, exploit, third-party-advisory)
- 2fdefc65-d750-4b8d-96ee-6e2c0c42dbfe (vdb-entry, Not Applicable, third-party-advisory)
Frequently asked questions
- What is CVE-2026-30796?
- CVE-2026-30796 is a high-severity vulnerability in Apple macOS, classified under Insufficiently Protected Credentials. CVSS score: 7.5/10. Published 2026-03-05.
- How severe is CVE-2026-30796?
- High severity. CVSS v3 base score is 7.5 out of 10.