# CVE-2021-38487: Potential Network Amplification and Information Exposure in RTI Connext Professional and Connext Micro

> Attackers can cause denial of service and information exposure in RTI Connext products by sending specially crafted packets.

- **Severity:** High 8.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 May 2022
- **Updated:** 23 Jun 2025
- **Also known as:** GHSA-vhvr-hgg7-6xqj

## What is CVE-2021-38487?

CVE-2021-38487 is a high-severity denial of service vulnerability in RTI Connext Micro, published on 5 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

RTI Connext Professional versions 4.1 to 6.1.0, and Connext Micro versions 2.4 and later are vulnerable when an attacker sends a specially crafted packet to flood target devices with unwanted traffic. This may result in a denial-of-service condition and information exposure.

Weakness: CWE-923 (Improper Restriction of Communication Channel to Intended Endpoints), CWE-406 (Insufficient Control of Network Message Volume (Network Amplification))

## Which versions are affected by CVE-2021-38487?

It affects 3 products.


Products: Rti Connext Dds Micro, Rti Connext Professional, Rti Connext Secure.

## How do I fix CVE-2021-38487?

No fix has been published for CVE-2021-38487 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-38487 being exploited?

There is no known exploitation of CVE-2021-38487 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-38487 and fix it if it is affected.

What it is: CVE-2021-38487 is a high-severity denial of service vulnerability in RTI Connext Micro, published on 5 May 2022. 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-2021-38487 in the wild and no public exploit code.

Affected product: RTI Connext Micro. 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-2021-38487/ (Markdown: https://insights.sbomify.com/CVE-2021-38487/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-38487
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-38487
- OSV: https://osv.dev/vulnerability/CVE-2021-38487

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-38487/
Summaries are generated and may contain mistakes; the official description above is the record.