Path Traversal in Rustdesk
CVE-2026-73102
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (31.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
Weakness classification (CWE)
References
- Pull Request (issue-tracking, patch)
- Patch Commit (patch)
- www.vulncheck.com/advisories/rustdesk-path-traversal-via-macos-clipboard-file-p… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-73102?
- CVE-2026-73102 is a medium-severity vulnerability in Rustdesk, classified under Path Traversal. CVSS score: 5.7/10. Published 2026-08-26.
- How severe is CVE-2026-73102?
- Medium severity. CVSS v3 base score is 5.7 out of 10.