# CVE-2026-109108: Wavlink WL-WN530BE1-A uploadVpn.cgi popen os command injection

> Remote attackers can execute arbitrary OS commands via the uploadVpn.cgi script in Wavlink WL-WN530BE1-A routers.

- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P`)
- **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:** 13 Oct 2026
- **Updated:** 16 Oct 2026
- **Also known as:** GHSA-643r-m5f4-v845

## What is CVE-2026-109108?

CVE-2026-109108 is a critical command injection vulnerability in Wavlink WL-WN530BE1-A, published on 13 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A security vulnerability has been detected in Wavlink WL-WN530BE1-A 251117. This affects the function popen of the file /cgi-bin/uploadVpn.cgi. Such manipulation of the argument Type leads to os command injection. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command), CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2026-109108?


## How do I fix CVE-2026-109108?

No fix has been published for CVE-2026-109108 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-109108 being exploited?

There is no known exploitation of CVE-2026-109108 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-109108 and fix it if it is affected.

What it is: CVE-2026-109108 is a critical command injection vulnerability in Wavlink WL-WN530BE1-A, published on 13 Oct 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-2026-109108 in the wild and no public exploit code.

Affected product: Wavlink WL-WN530BE1-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-2026-109108/ (Markdown: https://insights.sbomify.com/CVE-2026-109108/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-109108
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-109108
- OSV: https://osv.dev/vulnerability/CVE-2026-109108

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-109108/
Summaries are generated and may contain mistakes; the official description above is the record.