CVE-2026-58056 | RustDesk gates incoming control messages on per-capability f… | CVSS 7.6 HIGH

Description

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.

Metadata

CVE ID: CVE-2026-58056
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-28 00:55 UTC
Published: 2026-06-28 01:32 UTC
Last updated: 2026-06-28 01:32 UTC
Primary CWE: CWE-863
Incorrect Authorization
Vendor / Product: RustDesk / RustDesk
Sources: cve.org · NVD

Severity & Metrics

7.6 HIGH CVSS 3.1

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

Affected products (1)

Vendor	Product	Platform	Versions
RustDesk	RustDesk	—	0 ≤ ff226f6d8013dee2de5a6553abaf67bf32b3e875

Weakness (CWE)

CWE	Source	Description
CWE-863	cna	Incorrect Authorization

CVSS scores (2)

Score	Severity	Version	Source	Vector
7.6	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
7.2	HIGH	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N

References (2)

Proof of Concept https://github.com/bikini/exploitarium/tree/main/rustdesk-session-permission-pocs
VulnCheck Advisory: RustDesk - FileTransfer Session Authorization Scope Bypass https://www.vulncheck.com/advisories/rustdesk-filetransfer-session-authorization-scope-bypass