Quick answers
- Is CVE-2026-100388 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-100388 being exploited in the wild.
- How severe is CVE-2026-100388?
- Medium severity, with a CVSS score of 5.4, published 25 September 2026.
- Which products and versions are affected?
- Rustdesk before 1.5.0.
- Is there a fix for CVE-2026-100388?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-100388 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-100388?
- Check whether you run Rustdesk at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability exists in the Cliprdr message handler in RustDesk versions before 1.5.0 on Linux and macOS, where incoming file clipboard messages do not properly validate file transfer permissions. An authenticated remote peer with file transfer disabled can exploit this to read from and write to the process-wide clipboard cache. This allows retrieval of copied files and placement of files onto the host clipboard, bypassing the configured access control policy.
Affected products
- RustDesk RustDesk before 1.5.0
Timeline
- 2026-09-25: disclosed