# CVE-2015-6490: Memory corruption in n/a

> Remote attackers can execute arbitrary code on Allen-Bradley MicroLogix devices via a stack-based buffer overflow.

- **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:** 28 Oct 2015
- **Updated:** 3 Jun 2026
- **Also known as:** GHSA-rx97-5vw3-rxfp

## What is CVE-2015-6490?

CVE-2015-6490 is a critical memory corruption vulnerability in n/a, published on 28 Oct 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Stack-based buffer overflow on Allen-Bradley MicroLogix 1100 devices before B FRN 15.000 and 1400 devices through B FRN 15.003 allows remote attackers to execute arbitrary code via unspecified vectors.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2015-6490?

It affects 2 products.


Products: Rockwellautomation Micrologix 1100 Firmware, Rockwellautomation Micrologix 1400 Firmware.

## How do I fix CVE-2015-6490?

No fix has been published for CVE-2015-6490 yet. Limit exposure of the affected software until one is available.

## Is CVE-2015-6490 being exploited?

There is no known exploitation of CVE-2015-6490 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-6984](https://insights.sbomify.com/CVE-2020-6984/): Weak cryptography in Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior (critical 9.8)
- [CVE-2020-6990](https://insights.sbomify.com/CVE-2020-6990/): Hardcoded credentials in Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior (critical 9.8)
- [CVE-2022-3166](https://insights.sbomify.com/CVE-2022-3166/): MicroLogix 1100 & 1400 Product Web Server Application Vulnerable to Denial-Of-Service Condition Attack (high 7.5)
- [CVE-2021-33012](https://insights.sbomify.com/CVE-2021-33012/): Denial of service in Rockwell Automation MicroLogix 1100 (high 7.5)
- [CVE-2020-6988](https://insights.sbomify.com/CVE-2020-6988/): Information disclosure in Rockwell Automation MicroLogix 1400 Controllers Series B v21.001 and prior, Series A, all versions, MicroLogix 1100 Controller, all versions, RSLogix 500 Software v12.001 and prior (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-6490 and fix it if it is affected.

What it is: CVE-2015-6490 is a critical memory corruption vulnerability in n/a, published on 28 Oct 2015. 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-2015-6490 in the wild and no public exploit code.

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-2015-6490/ (Markdown: https://insights.sbomify.com/CVE-2015-6490/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-6490
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-6490
- OSV: https://osv.dev/vulnerability/CVE-2015-6490

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-6490/
Summaries are generated and may contain mistakes; the official description above is the record.