# CVE-2016-9362: Auth bypass in WAGO Ethernet cards

> Unauthenticated attackers can view and modify device settings by accessing a specific URL on WAGO Ethernet card web servers.

- **Severity:** Critical 9.1 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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:** 13 Feb 2017
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-9grp-vp5p-rx5w

## What is CVE-2016-9362?

CVE-2016-9362 is a critical authentication bypass vulnerability in WAGO Ethernet cards, published on 13 Feb 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in WAGO 750-8202/PFC200 prior to FW04 (released August 2015), WAGO 750-881 prior to FW09 (released August 2016), and WAGO 0758-0874-0000-0111. By accessing a specific uniform resource locator (URL) on the web server, a malicious user is able to edit and to view settings without authenticating.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2016-9362?

It affects 3 products.


Products: Wago 750-Xxxx Series Firmware, Wago 758-Xxxx Series Firmware, Wago Pfc200 Firmware.

## How do I fix CVE-2016-9362?

No fix has been published for CVE-2016-9362 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-9362 being exploited?

There is no known exploitation of CVE-2016-9362 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-9362 and fix it if it is affected.

What it is: CVE-2016-9362 is a critical authentication bypass vulnerability in WAGO Ethernet cards, published on 13 Feb 2017. 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-2016-9362 in the wild and no public exploit code.

Affected product: WAGO Ethernet cards. 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-2016-9362/ (Markdown: https://insights.sbomify.com/CVE-2016-9362/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-9362
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-9362
- OSV: https://osv.dev/vulnerability/CVE-2016-9362

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From sbomify Insights: https://insights.sbomify.com/CVE-2016-9362/
Summaries are generated and may contain mistakes; the official description above is the record.