# CVE-2018-7779: Auth bypass in Wiser for KNX

> Weak and unprotected FTP access in Schneider Electric Wiser devices allows attackers to gain unauthorized access to the system.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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:** 3 Jul 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-6xh7-vq29-434x

## What is CVE-2018-7779?

CVE-2018-7779 is a high-severity authentication bypass vulnerability in Schneider Electric SE Wiser for KNX, published on 3 Jul 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In Schneider Electric Wiser for KNX V2.1.0 and prior, homeLYnk V2.0.1 and prior; and spaceLYnk V2.1.0 and prior, weak and unprotected FTP access could allow an attacker unauthorized access.

## Which versions are affected by CVE-2018-7779?

It affects 3 products.


Products: Schneider-Electric Homelynk Firmware, Schneider-Electric Spacelynk Firmware, Schneider-Electric Wiser for Knx Firmware.

## How do I fix CVE-2018-7779?

No fix has been published for CVE-2018-7779 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-7779 being exploited?

There is no known exploitation of CVE-2018-7779 in the wild and no public exploit code.

## Other vulnerabilities in Schneider Electric SE Wiser for KNX

- [CVE-2021-22737](https://insights.sbomify.com/CVE-2021-22737/): Hardcoded credentials in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 and prior (critical 9.8)
- [CVE-2021-22738](https://insights.sbomify.com/CVE-2021-22738/): Weak cryptography in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 and prior (critical 9.8)
- [CVE-2021-22732](https://insights.sbomify.com/CVE-2021-22732/): Privilege escalation in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 and prior (high 7.8)
- [CVE-2021-22733](https://insights.sbomify.com/CVE-2021-22733/): Privilege escalation in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 and prior (high 7.8)
- [CVE-2021-22736](https://insights.sbomify.com/CVE-2021-22736/): Path traversal in homeLYnk (Wiser For KNX) and spaceLYnk V2.60 and prior (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-7779 and fix it if it is affected.

What it is: CVE-2018-7779 is a high-severity authentication bypass vulnerability in Schneider Electric SE Wiser for KNX, published on 3 Jul 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-2018-7779 in the wild and no public exploit code.

Affected product: Schneider Electric SE Wiser for KNX. 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-2018-7779/ (Markdown: https://insights.sbomify.com/CVE-2018-7779/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-7779
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-7779
- OSV: https://osv.dev/vulnerability/CVE-2018-7779

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-7779/
Summaries are generated and may contain mistakes; the official description above is the record.