# CVE-2026-90847: EFM ipTIME C200E System Setup iux_set.cgi os command injection

> Remote attackers can execute arbitrary OS commands on EFM ipTIME C200E routers via the System Setup interface.

- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Sep 2026
- **Updated:** 15 Sep 2026
- **Also known as:** GHSA-7cwj-49q5-wgwg

## What is CVE-2026-90847?

CVE-2026-90847 is a critical command injection vulnerability in EFM ipTIME C200E, published on 15 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability was determined in EFM ipTIME C200E 1.094. The impacted element is an unknown function of the file iux_set.cgi of the component System Setup. This manipulation causes os command injection. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command), CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2026-90847?


## How do I fix CVE-2026-90847?

No fix has been published for CVE-2026-90847 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-90847 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90847 exists.

Public exploit code:

- https://github.com/shlln/CVE-2026-90847 (github_poc): https://github.com/shlln/CVE-2026-90847

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-90847 and fix it if it is affected.

What it is: CVE-2026-90847 is a critical command injection vulnerability in EFM ipTIME C200E, published on 15 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90847 exists.

Affected product: EFM ipTIME C200E. 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-2026-90847/ (Markdown: https://insights.sbomify.com/CVE-2026-90847/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-90847
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-90847
- OSV: https://osv.dev/vulnerability/CVE-2026-90847

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-90847/
Summaries are generated and may contain mistakes; the official description above is the record.