CVE-2026-58056

EUVD-2026-39976
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
7.6 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 25.94%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
rustdeskrustdesk
𝑥
≤ 1.4.8
CNA
Common Weakness Enumeration
References
https://github.com/bikini/exploitarium/tree/main/rustdesk-session-permission-pocs
https://www.vulncheck.com/advisories/rustdesk-filetransfer-session-authorization-scope-bypass