# CVE-2018-8859: Auth bypass in SmartServer 1

> Attackers can bypass authentication in Echelon SmartServer and i.LON devices by manipulating directory names, requiring upgrades to secure versions.

- **Severity:** Critical 9.8 (`CVSS:3.1/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:** 24 Jul 2018
- **Updated:** 2 Jun 2026
- **Also known as:** GHSA-fvc7-qrrw-9pwh

## What is CVE-2018-8859?

CVE-2018-8859 is a critical authentication bypass vulnerability in Echelon SmartServer 1, published on 24 Jul 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Echelon SmartServer 1 all versions, SmartServer 2 all versions prior to release 4.11.007, i.LON 100 all versions, and i.LON 600 all versions. An attacker can bypass the required authentication specified in the security configuration file by including extra characters in the directory name when specifying the directory to be accessed. This vulnerability does not affect the i.LON 600 product.

Weakness: CWE-287 (Improper Authentication), CWE-288 (Authentication Bypass Using an Alternate Path or Channel)

## Which versions are affected by CVE-2018-8859?

It affects 4 products.


Products: Echelon I.lon 100 Firmware, Echelon I.lon 600 Firmware, Echelon Smartserver 1 Firmware, Echelon Smartserver 2 Firmware.

## How do I fix CVE-2018-8859?

No fix has been published for CVE-2018-8859 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-8859 being exploited?

There is no known exploitation of CVE-2018-8859 in the wild and no public exploit code.

## Other vulnerabilities in Echelon SmartServer 1

- [CVE-2018-10627](https://insights.sbomify.com/CVE-2018-10627/): Information disclosure in SmartServer 1 (critical 9.8)
- [CVE-2018-8851](https://insights.sbomify.com/CVE-2018-8851/): Hardcoded credentials in SmartServer 1 (critical 9.8)
- [CVE-2018-8855](https://insights.sbomify.com/CVE-2018-8855/): Misconfiguration in SmartServer 1 (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-8859 and fix it if it is affected.

What it is: CVE-2018-8859 is a critical authentication bypass vulnerability in Echelon SmartServer 1, published on 24 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-2018-8859 in the wild and no public exploit code.

Affected product: Echelon SmartServer 1. 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-2018-8859/ (Markdown: https://insights.sbomify.com/CVE-2018-8859/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-8859
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-8859
- OSV: https://osv.dev/vulnerability/CVE-2018-8859

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-8859/
Summaries are generated and may contain mistakes; the official description above is the record.