# CVE-2018-15720: Hardcoded credentials in Logitech Harmony Hub

> Hard-coded credentials in the XMPP server allow remote attackers to access the local API of Logitech Harmony Hub devices.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Dec 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-2m2c-428p-vrf4

## What is CVE-2018-15720?

CVE-2018-15720 is a critical vulnerability in Logitech Harmony Hub, published on 20 Dec 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Logitech Harmony Hub before version 4.15.206 contained two hard-coded accounts in the XMPP server that gave remote users access to the local API.

Weakness: CWE-798 (Use of Hard-coded Credentials)

## Which versions are affected by CVE-2018-15720?

It affects 1 product.


Products: Logitech Harmony Hub Firmware.

## How do I fix CVE-2018-15720?

No fix has been published for CVE-2018-15720 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-15720 being exploited?

There is no known exploitation of CVE-2018-15720 in the wild and no public exploit code.

## Other vulnerabilities in Logitech Harmony Hub

- [CVE-2018-15721](https://insights.sbomify.com/CVE-2018-15721/): Auth bypass in Logitech Harmony Hub (critical 9.8)
- [CVE-2018-15723](https://insights.sbomify.com/CVE-2018-15723/): Command injection in Logitech Harmony Hub (critical 9.8)
- [CVE-2018-15722](https://insights.sbomify.com/CVE-2018-15722/): Command injection in Logitech Harmony Hub (high 8.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-15720 and fix it if it is affected.

What it is: CVE-2018-15720 is a critical vulnerability in Logitech Harmony Hub, published on 20 Dec 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-2018-15720 in the wild and no public exploit code.

Affected product: Logitech Harmony Hub. 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-2018-15720/ (Markdown: https://insights.sbomify.com/CVE-2018-15720/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-15720
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-15720
- OSV: https://osv.dev/vulnerability/CVE-2018-15720

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-15720/
Summaries are generated and may contain mistakes; the official description above is the record.