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CVE-2026-73102: RustDesk Path Traversal via macOS Clipboard File-Paste

• Severity: medium (CVSS 5.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-26 · updated 2026-09-23
• Weakness: CWE-22

Description

RustDesk versions 1.3.9 through 1.4.9 contain a path traversal vulnerability in the macOS clipboard file-paste code path. The application accepts peer-supplied file descriptor names and joins them to the selected target directory without requiring normalized relative paths. A remote peer in an active clipboard file-paste session can use parent-directory components or absolute paths to write files outside the intended target directory at locations writable by the RustDesk process. Commit 6f1eb16 fixes the issue by validating descriptor names and safely joining paths.

Affected products

• rustdesk-client RustDesk Client: from 1.3.9 through 1.4.9

References

• https://github.com/rustdesk/rustdesk/commit/6f1eb164d616e0e2bfbcf8c6b7c8083b09d7ed06
• https://github.com/rustdesk/rustdesk/pull/15693
• https://www.vulncheck.com/advisories/rustdesk-path-traversal-via-macos-clipboard-file-paste

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