What’s Vulnerable › Vulnerabilities

CVE-2026-100417: RustDesk before 1.5.0 One-Way File Transfer Bypass

• Severity: low (CVSS 3.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-25 · updated 2026-09-30
• Weakness: CWE-862

Description

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.

Affected products

• rustdesk-client RustDesk Client: before 1.5.0 — fixed in 1.5.0

How to fix

Upgrade to a fixed version: rustdesk-client RustDesk Client 1.5.0. Check the vendor advisory for mitigations.

References

• 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

Get alerted when CVE-2026-100417 or the next vulnerability affects your stack