# CVE-2026-6432: Improper bounds validation in EmberZNet SDK

> An attacker with network access can leak limited stack bytes via improper bounds validation in the ZAP command parser of the EmberZNet SDK.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/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:** 25 Jun 2026
- **Updated:** 15 Oct 2026
- **Also known as:** GHSA-2mwj-cc94-39wv

## What is CVE-2026-6432?

CVE-2026-6432 is a medium-severity vulnerability in Silicon Labs EmberZNet, published on 25 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Improper bounds validation in the ZAP command parser of EmberZNet SDK versions 8.0.0 through 9.1.1 (inclusive) and before 7.5.2 (exclusive) may result in crashes or dynamic memory leakage. In order to exploit this vulnerability, an attacker would have to have the ability to send arbitrary messages on the network. The only known exploit of this vulnerability leaks a limited number of bytes from the stack. No denial-of-service, memory corruption, or remote code execution has been shown.

Weakness: CWE-130 (Improper Handling of Length Parameter Inconsistency)

## Which versions are affected by CVE-2026-6432?


## How do I fix CVE-2026-6432?

No fix has been published for CVE-2026-6432 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-6432 being exploited?

There is no known exploitation of CVE-2026-6432 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-6432 and fix it if it is affected.

What it is: CVE-2026-6432 is a medium-severity vulnerability in Silicon Labs EmberZNet, published on 25 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-6432 in the wild and no public exploit code.

Affected product: Silicon Labs EmberZNet. 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-2026-6432/ (Markdown: https://insights.sbomify.com/CVE-2026-6432/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-6432
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6432
- OSV: https://osv.dev/vulnerability/CVE-2026-6432

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-6432/
Summaries are generated and may contain mistakes; the official description above is the record.