# CVE-2026-3716: Wavlink WL-WN579X3-C adm.cgi sub_401AD4 cross site scripting

> Remote attackers can inject malicious scripts via the Hostname argument in the admin interface, potentially compromising user sessions.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 8 Mar 2026
- **Updated:** 11 Mar 2026
- **Also known as:** GHSA-hf5c-9m3r-mqv2

## What is CVE-2026-3716?

CVE-2026-3716 is a medium-severity cross-site scripting vulnerability in Wavlink WL-WN579X3-C, published on 8 Mar 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

A vulnerability was determined in Wavlink WL-WN579X3-C 231124. This vulnerability affects the function sub_401AD4 of the file /cgi-bin/adm.cgi. Executing a manipulation of the argument Hostname can lead to cross site scripting. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 20260226 is able to resolve this issue. The affected component should be upgraded. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-3716?

It affects 1 product.


Products: Wavlink Wl-Wn579x3-C Firmware.

## How do I fix CVE-2026-3716?

No fix has been published for CVE-2026-3716 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-3716 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3716 exists.

## Other vulnerabilities in Wavlink WL-WN579X3-C

- [CVE-2026-5004](https://insights.sbomify.com/CVE-2026-5004/): Wavlink WL-WN579X3-C UPNP firewall.cgi sub_4019FC stack-based overflow (high 8.7)
- [CVE-2026-3715](https://insights.sbomify.com/CVE-2026-3715/): Wavlink WL-WN579X3-C firewall.cgi sub_40139C stack-based overflow (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-3716 and fix it if it is affected.

What it is: CVE-2026-3716 is a medium-severity cross-site scripting vulnerability in Wavlink WL-WN579X3-C, published on 8 Mar 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3716 exists.

Affected product: Wavlink WL-WN579X3-C. 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-2026-3716/ (Markdown: https://insights.sbomify.com/CVE-2026-3716/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-3716
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-3716
- OSV: https://osv.dev/vulnerability/CVE-2026-3716

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-3716/
Summaries are generated and may contain mistakes; the official description above is the record.