# CVE-2018-1146: Auth bypass in N750 DB Wi-Fi Dual-Band N+ Gigabit Router (F9K1103)

> Remote attackers can enable passwordless root telnet access on Belkin N750 routers via a crafted HTTP request, leading to full device compromise.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Apr 2018
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-7j6q-65hr-h78r

## What is CVE-2018-1146?

CVE-2018-1146 is a high-severity authentication bypass vulnerability in Belkin N750 DB Wi-Fi Dual-Band N+ Gigabit Router (F9K1103), published on 19 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A remote unauthenticated user can enable telnet on the Belkin N750 using firmware version 1.10.22 by sending a crafted HTTP request to set.cgi. When enabled the telnet session requires no password and provides root access.

## Which versions are affected by CVE-2018-1146?

It affects 1 product.


Products: Belkin N750 Firmware.

## How do I fix CVE-2018-1146?

No fix has been published for CVE-2018-1146 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-1146 being exploited?

There is no known exploitation of CVE-2018-1146 in the wild and no public exploit code.

## Other vulnerabilities in Belkin N750 DB Wi-Fi Dual-Band N+ Gigabit Router (F9K1103)

- [CVE-2013-7173](https://insights.sbomify.com/CVE-2013-7173/): Memory corruption in n/a (critical 9.8)
- [CVE-2018-1143](https://insights.sbomify.com/CVE-2018-1143/): Command injection in N750 DB Wi-Fi Dual-Band N+ Gigabit Router (F9K1103) (critical 9.8)
- [CVE-2018-1144](https://insights.sbomify.com/CVE-2018-1144/): Command injection in N750 DB Wi-Fi Dual-Band N+ Gigabit Router (F9K1103) (critical 9.8)
- [CVE-2018-1145](https://insights.sbomify.com/CVE-2018-1145/): Memory corruption in N750 DB Wi-Fi Dual-Band N+ Gigabit Router (F9K1103) (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-1146 and fix it if it is affected.

What it is: CVE-2018-1146 is a high-severity authentication bypass vulnerability in Belkin N750 DB Wi-Fi Dual-Band N+ Gigabit Router (F9K1103), published on 19 Apr 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-1146 in the wild and no public exploit code.

Affected product: Belkin N750 DB Wi-Fi Dual-Band N+ Gigabit Router (F9K1103). 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-2018-1146/ (Markdown: https://insights.sbomify.com/CVE-2018-1146/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-1146
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-1146
- OSV: https://osv.dev/vulnerability/CVE-2018-1146

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-1146/
Summaries are generated and may contain mistakes; the official description above is the record.