# CVE-2026-8313: Rockwell Automation Arena® - Memory Corruption Vulnerability

> An attacker can execute arbitrary code by tricking a user into opening a malicious file in Rockwell Arena Simulation due to an out-of-bounds write.

- **Severity:** High 7.0 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 14 Jul 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-h5wm-63j8-q5vc

## What is CVE-2026-8313?

CVE-2026-8313 is a high-severity memory corruption vulnerability in Rockwell Automation Arena® Simulation, published on 14 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A security issue exists within Arena® Simulation due to a memory corruption vulnerability in the linker.exe (Siman) component. The vulnerability stems from improper validation of user-supplied data, which can result in an out-of-bounds write. An attacker could leverage this vulnerability to execute arbitrary code in the context of the current process by convincing a user to open a malicious file.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2026-8313?

It affects 1 product.


Products: Rockwellautomation Arena.

## How do I fix CVE-2026-8313?

No fix has been published for CVE-2026-8313 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-8313 being exploited?

There is no known exploitation of CVE-2026-8313 in the wild and no public exploit code.

## Other vulnerabilities in Rockwell Automation Arena® Simulation

- [CVE-2025-2285](https://insights.sbomify.com/CVE-2025-2285/): Local Code Execution Vulnerability in Arena® (high 8.5)
- [CVE-2025-2286](https://insights.sbomify.com/CVE-2025-2286/): Local Code Execution Vulnerability in Arena® (high 8.5)
- [CVE-2025-2287](https://insights.sbomify.com/CVE-2025-2287/): Local Code Execution Vulnerability in Arena® (high 8.5)
- [CVE-2025-2288](https://insights.sbomify.com/CVE-2025-2288/): Local Code Execution Vulnerability in Arena® (high 8.5)
- [CVE-2025-2293](https://insights.sbomify.com/CVE-2025-2293/): Local Code Execution Vulnerability in Arena® (high 8.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-8313 and fix it if it is affected.

What it is: CVE-2026-8313 is a high-severity memory corruption vulnerability in Rockwell Automation Arena® Simulation, published on 14 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-8313 in the wild and no public exploit code.

Affected product: Rockwell Automation Arena® Simulation. 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-2026-8313/ (Markdown: https://insights.sbomify.com/CVE-2026-8313/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-8313
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-8313
- OSV: https://osv.dev/vulnerability/CVE-2026-8313

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-8313/
Summaries are generated and may contain mistakes; the official description above is the record.