# CVE-2017-18743: Auth bypass in n/a

> Attackers can bypass authentication on various NETGEAR routers, gaining unauthorized access to administrative functions.

- **Severity:** High 8.8 (`CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:N/S:U/UI:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Apr 2020
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-5rhv-5888-hp8c

## What is CVE-2017-18743?

CVE-2017-18743 is a high-severity authentication bypass vulnerability in Netgear R6300 Firmware, published on 23 Apr 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Certain NETGEAR devices are affected by authentication bypass. This affects R6300v2 before 1.0.4.8, R6400 before 1.0.1.20, R6700 before 1.0.1.20, R6900 before 1.0.1.20, R7000 before 1.0.7.10, R7100LG before V1.0.0.32, R7300DST before 1.0.0.52, R7900 before 1.0.1.16, R8000 before 1.0.3.36, R8300 before 1.0.2.94, R8500 before 1.0.2.94, WNDR3400v3 before 1.0.1.12, and WNR3500Lv2 before 1.2.0.40.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2017-18743?

It affects 13 products.


Products: Netgear R6300 Firmware, Netgear R6400 Firmware, Netgear R6700 Firmware, Netgear R6900 Firmware, Netgear R7000 Firmware, Netgear R7100lg Firmware, Netgear R7300dst Firmware, Netgear R7900 Firmware, Netgear R8000 Firmware, Netgear R8300 Firmware, Netgear R8500 Firmware, Netgear Wndr3400 Firmware, Netgear Wnr3500l Firmware.

## How do I fix CVE-2017-18743?

No fix has been published for CVE-2017-18743 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-18743 being exploited?

There is no known exploitation of CVE-2017-18743 in the wild and no public exploit code.

## Other vulnerabilities in Netgear R6300 Firmware

- [CVE-2017-18765](https://insights.sbomify.com/CVE-2017-18765/): Denial of service in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-18743 and fix it if it is affected.

What it is: CVE-2017-18743 is a high-severity authentication bypass vulnerability in Netgear R6300 Firmware, published on 23 Apr 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-18743 in the wild and no public exploit code.

Affected product: Netgear R6300 Firmware. 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-2017-18743/ (Markdown: https://insights.sbomify.com/CVE-2017-18743/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-18743
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-18743
- OSV: https://osv.dev/vulnerability/CVE-2017-18743

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-18743/
Summaries are generated and may contain mistakes; the official description above is the record.