# CVE-2025-0727: Eclipse ThreadX NetX Duo HTTP server single PUT request integer underflow

> An attacker can cause a denial of service in Eclipse ThreadX NetX Duo via an integer underflow in the HTTP server when handling crafted PUT requests.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Feb 2025
- **Updated:** 21 Feb 2025
- **Also known as:** GHSA-jf6x-9mgc-p72w

## What is CVE-2025-0727?

CVE-2025-0727 is a medium-severity vulnerability in Eclipse Foundation ThreadX, published on 21 Feb 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

In NetX HTTP server functionality of Eclipse ThreadX NetX Duo before 
version 6.4.2, an attacker can cause an integer underflow and a 
subsequent denial of service by writing a very large file, by specially 
crafted packets with Content-Length in one packet smaller than the data 
request size of the other packet. A possible workaround is to disable 
HTTP PUT support.

Weakness: CWE-191 (Integer Underflow (Wrap or Wraparound))

## Which versions are affected by CVE-2025-0727?

It affects 1 product.


Products: Eclipse Threadx Netx Duo.

## How do I fix CVE-2025-0727?

No fix has been published for CVE-2025-0727 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-0727 being exploited?

There is no known exploitation of CVE-2025-0727 in the wild and no public exploit code.

## Other vulnerabilities in Eclipse Foundation ThreadX

- [CVE-2025-55085](https://insights.sbomify.com/CVE-2025-55085/): Web http client: Unchecked Server-Side Malicious Packet Issue (high 8.8)
- [CVE-2025-55102](https://insights.sbomify.com/CVE-2025-55102/): Denial of service in Eclipse ThreadX - NetX Duo (high 8.7)
- [CVE-2026-11576](https://insights.sbomify.com/CVE-2026-11576/): Memory corruption in Eclipse ThreadX - NetX Duo (high 7.5)
- [CVE-2025-2260](https://insights.sbomify.com/CVE-2025-2260/): Eclipse ThreadX NetX Duo HTTP component server denial of service (high 7.1)
- [CVE-2025-0726](https://insights.sbomify.com/CVE-2025-0726/): Eclipse ThreadX NetX Duo HTTP server denial of service (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-0727 and fix it if it is affected.

What it is: CVE-2025-0727 is a medium-severity vulnerability in Eclipse Foundation ThreadX, published on 21 Feb 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-0727 in the wild and no public exploit code.

Affected product: Eclipse Foundation ThreadX. 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-2025-0727/ (Markdown: https://insights.sbomify.com/CVE-2025-0727/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-0727
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-0727
- OSV: https://osv.dev/vulnerability/CVE-2025-0727

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-0727/
Summaries are generated and may contain mistakes; the official description above is the record.