# CVE-2026-8173: Information Disclosure via 'Copy learned MAC Addresses' Function

> Unauthenticated attackers can retrieve logged MAC addresses from the web interface via improper error message generation in Murrelektronik Xelity switches.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 24 Aug 2026
- **Updated:** 27 Aug 2026
- **Also known as:** GHSA-f42v-6cfh-6pj5

## What is CVE-2026-8173?

CVE-2026-8173 is a medium-severity vulnerability in Murrelektronik 6 TX M GE + 4 Power M12 IP67, published on 24 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The web GUI of affected Murrelektronik Xelity switches logs MAC addresses from the devices MAC address table when an authenticated administrator uses the 'Copy learned MAC Addresses' function. Due to improper generation of error messages, an unauthenticated attacker with network access to the web interface can retrieve the logged MAC addresses via browser developer tools.

Weakness: CWE-209 (Generation of Error Message Containing Sensitive Information)

## Which versions are affected by CVE-2026-8173?


## How do I fix CVE-2026-8173?

No fix has been published for CVE-2026-8173 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-8173 being exploited?

There is no known exploitation of CVE-2026-8173 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-8173 and fix it if it is affected.

What it is: CVE-2026-8173 is a medium-severity vulnerability in Murrelektronik 6 TX M GE + 4 Power M12 IP67, published on 24 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-8173 in the wild and no public exploit code.

Affected product: Murrelektronik 6 TX M GE + 4 Power M12 IP67. 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-2026-8173/ (Markdown: https://insights.sbomify.com/CVE-2026-8173/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-8173
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-8173
- OSV: https://osv.dev/vulnerability/CVE-2026-8173

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-8173/
Summaries are generated and may contain mistakes; the official description above is the record.