RustDesk before 1.5.0 Missing Authorization Check on Incoming File Clipboard Messages (CVE-2026-100388) | HOL Guard CVE

Medium · CVSS 5.3CVE-2026-100388

RustDesk before 1.5.0 Missing Authorization Check on Incoming File Clipboard Messages

Answer in brief

CVE-2026-100388 records a Medium severity (CVSS 5.3) vulnerability in RustDesk before 1.5.0 Missing Authorization Check on Incoming File Clipboard Messages. The current sources do not mark it as known exploited. The current feed maps rustdesk/rustdesk (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.3
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps rustdesk/rustdesk (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
rustdesk/rustdeskgeneric	>=0 <1.5.0	1.5.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for rustdesk/rustdesk.
Review the reported fix. Update rustdesk/rustdesk to 1.5.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

RustDesk versions before 1.5.0 fail to properly validate file transfer permissions on incoming file clipboard messages in the Cliprdr message handler on Linux and macOS. Authenticated remote peers with disabled file transfer permissions can place files onto the host clipboard and retrieve copied files and contents from the process-wide clipboard cache.

Quoted source text, attributed separately from HOL analysis.