# CVE-2016-4523: Trihedral VTScada (formerly VTS) Denial-of-Service

> Remote attackers can crash Trihedral VTScada via the WAP interface, causing a denial of service in industrial control environments.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Yes, since 15 Apr 2022 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Jun 2016
- **Updated:** 21 Oct 2025
- **Also known as:** GHSA-rp9v-r63v-9vfg

## What is CVE-2016-4523?

CVE-2016-4523 is a high-severity denial of service vulnerability in n/a, published on 9 Jun 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The WAP interface in Trihedral VTScada (formerly VTS) 8.x through 11.x before 11.2.02 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via unspecified vectors.

Weakness: CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2016-4523?

It affects 1 product.


Products: Trihedral Vtscada.

## How do I fix CVE-2016-4523?

No fix has been published for CVE-2016-4523 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 6 May 2022.

## Is CVE-2016-4523 being exploited?

Yes. Attackers have exploited CVE-2016-4523 in the wild since at least 15 Apr 2022.

## Other vulnerabilities in n/a

- [CVE-2016-4510](https://insights.sbomify.com/CVE-2016-4510/): Auth bypass in n/a (critical 9.1)
- [CVE-2016-4532](https://insights.sbomify.com/CVE-2016-4532/): Path traversal in n/a (critical 9.1)
- [CVE-2017-14029](https://insights.sbomify.com/CVE-2017-14029/): Other in Trihedral Engineering Limited VTScada (high 7.8)
- [CVE-2017-14031](https://insights.sbomify.com/CVE-2017-14031/): Privilege escalation in Trihedral Engineering Limited VTScada (high 7.8)
- [CVE-2014-9192](https://insights.sbomify.com/CVE-2014-9192/): Trihedral Engineering Limited VTScada Integer Overflow (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-4523 and fix it if it is affected.

What it is: CVE-2016-4523 is a high-severity denial of service vulnerability in n/a, published on 9 Jun 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: Yes. Attackers have exploited CVE-2016-4523 in the wild since at least 15 Apr 2022.

Affected product: n/a. 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-2016-4523/ (Markdown: https://insights.sbomify.com/CVE-2016-4523/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-4523
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-4523
- OSV: https://osv.dev/vulnerability/CVE-2016-4523

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-4523/
Summaries are generated and may contain mistakes; the official description above is the record.