Vulnerability record · CVE-2026-100417 · published 25 September 2026

CVE-2026-100417: Missing authorization vulnerability

RustDesk before 1.5.0 on Windows fails to enforce the one-way file transfer option against peer clipboard file requests, allowing authenticated peers to read files from the host clipboard. Attackers can send FormatDataRequest and FileContentsRequest messages to retrieve copied files by guessing the FileGroupDescriptorW format identifier.

2.3 CVSS 4.0 Low EPSS 0.21% · top 90.2% CWE-862 · Missing authorization Deferred

2.3CVSS 4.0 base score

0.21%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

6References

25 Sep 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
https://github.com/rustdesk/rustdesk
https://github.com/rustdesk/rustdesk/blob/1.4.9/libs/clipboard/src/windows/wf_cliprdr.c#L2728-L2770
https://github.com/rustdesk/rustdesk/blob/1.4.9/src/ui_cm_interface.rs#L618-L638
https://github.com/rustdesk/rustdesk/commit/f299fb9906006247863250d7dfaa016f29eef7a4
https://github.com/rustdesk/rustdesk/pull/16333
https://www.vulncheck.com/advisories/rustdesk-before-1.5.0-one-way-file-transfer-bypass

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Source: NIST National Vulnerability Database (record CVE-2026-100417), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.