Auth bypass in Rustdesk
CVE-2026-58056
RustDesk gates incoming control messages on per-capability flags rather than on the session's authorized connection type, and a file-transfer session does not clear those flags. A peer holding only a valid FileTransfer authorization can inject keyboard and mouse input and reach the unguarded screenshot and display-capture handlers, acting outside its granted scope.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L.
EPSS exploit prediction
EPSS: 0.003 (23.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Rustdesk — versions 1.4.9, 0
Weakness classification (CWE)
References
- github.com/bikini/exploitarium/tree/main/rustdesk-session-permission-pocs (exploit, third-party-advisory)
- www.vulncheck.com/advisories/rustdesk-filetransfer-session-authorization-scope-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-58056?
- CVE-2026-58056 is a high-severity vulnerability in Rustdesk, classified under Incorrect Authorization. CVSS score: 7.6/10. Published 2026-06-28.
- How severe is CVE-2026-58056?
- High severity. CVSS v3 base score is 7.6 out of 10.