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

> An authenticated peer can inject out-of-scope control messages to observe and control the host beyond granted permissions in RustDesk.

- **Severity:** High 8.7 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Jul 2026
- **Updated:** 11 Aug 2026
- **Also known as:** GHSA-83jc-7j6x-wvj9

## What is CVE-2026-57850?

CVE-2026-57850 is a high-severity missing authorization vulnerability in RustDesk, published on 10 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official 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.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-57850?


## How do I fix CVE-2026-57850?

No fix has been published for CVE-2026-57850 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-57850 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-57850 exists.

Public exploit code:

- RustDesk < 1.4.9 - Missing Session-Scope Enforcement Allows Out-of-Scope Control Message Injection (github_poc): https://github.com/sn0x-sharma/CVE-2026-57850

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-57850 and fix it if it is affected.

What it is: CVE-2026-57850 is a high-severity missing authorization vulnerability in RustDesk, published on 10 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-57850 exists.

Affected product: RustDesk. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-57850/ (Markdown: https://insights.sbomify.com/CVE-2026-57850/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-57850
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-57850
- OSV: https://osv.dev/vulnerability/CVE-2026-57850

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-57850/
Summaries are generated and may contain mistakes; the official description above is the record.