# CVE-2020-7485: Auth bypass in TriStation TS1131 (v4.0.0 to v4.9.0, v4.10.0)

> A legacy support account in TriStation software allows improper access to the host machine, enabling potential privilege escalation or code execution.

- **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:** 15 Apr 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-4m2f-rpgh-x4cm

## What is CVE-2020-7485?

CVE-2020-7485 is a critical authentication bypass vulnerability in TriStation TS1131 (v4.0.0 to v4.9.0, v4.10.0), published on 15 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

**VERSION NOT SUPPORTED WHEN ASSIGNED** A legacy support account in the TriStation software version v4.9.0 and earlier could cause improper access to the TriStation host machine. This was addressed in TriStation version v4.9.1 and v4.10.1 released on May 30, 2013.1

## Which versions are affected by CVE-2020-7485?

It affects 1 product.


Products: Schneider-Electric Tristation 1131.

## How do I fix CVE-2020-7485?

No fix has been published for CVE-2020-7485 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-7485 being exploited?

There is no known exploitation of CVE-2020-7485 in the wild and no public exploit code.

## Other vulnerabilities in TriStation TS1131 (v4.0.0 to v4.9.0, v4.10.0)

- [CVE-2020-7483](https://insights.sbomify.com/CVE-2020-7483/): Information disclosure in TriStation TS1131 (v4.0.0 to v4.9.0, v4.10.0) (high 7.5)
- [CVE-2020-7484](https://insights.sbomify.com/CVE-2020-7484/): Denial of service in TriStation TS1131 (v4.0.0 to v4.9.0, v4.10.0) (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-7485 and fix it if it is affected.

What it is: CVE-2020-7485 is a critical authentication bypass vulnerability in TriStation TS1131 (v4.0.0 to v4.9.0, v4.10.0), published on 15 Apr 2020. 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-2020-7485 in the wild and no public exploit code.

Affected product: TriStation TS1131 (v4.0.0 to v4.9.0, v4.10.0). 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-2020-7485/ (Markdown: https://insights.sbomify.com/CVE-2020-7485/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-7485
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-7485
- OSV: https://osv.dev/vulnerability/CVE-2020-7485

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-7485/
Summaries are generated and may contain mistakes; the official description above is the record.