# CVE-2025-3693: Tenda W12 httpd cgiWifiRadioSet stack-based overflow

> A remote attacker can trigger a stack-based buffer overflow in the Tenda W12 router's httpd service to execute arbitrary code.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/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:** 16 Apr 2025
- **Updated:** 16 Apr 2025
- **Also known as:** GHSA-mxvx-cwcc-38xf

## What is CVE-2025-3693?

CVE-2025-3693 is a high-severity memory corruption vulnerability in Tenda W12, published on 16 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was found in Tenda W12 3.0.0.5. It has been rated as critical. Affected by this issue is the function cgiWifiRadioSet of the file /bin/httpd. The manipulation leads to stack-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-121 (Stack-based Buffer Overflow), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2025-3693?

It affects 1 product.


Products: Tenda W12 Firmware.

## How do I fix CVE-2025-3693?

No fix has been published for CVE-2025-3693 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-3693 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-3693 exists.

## Other vulnerabilities in Tenda W12

- [CVE-2025-11549](https://insights.sbomify.com/CVE-2025-11549/): Tenda W12 HTTP Request modules wifiMacFilterSet stack-based overflow (high 8.7)
- [CVE-2025-11550](https://insights.sbomify.com/CVE-2025-11550/): Tenda W12 HTTP Request modules wifiScheduledSet null pointer dereference (high 7.1)
- [CVE-2025-9778](https://insights.sbomify.com/CVE-2025-9778/): Tenda W12 Administrative shadow hard-coded credentials (low 1.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-3693 and fix it if it is affected.

What it is: CVE-2025-3693 is a high-severity memory corruption vulnerability in Tenda W12, published on 16 Apr 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-3693 exists.

Affected product: Tenda W12. 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-2025-3693/ (Markdown: https://insights.sbomify.com/CVE-2025-3693/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-3693
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-3693
- OSV: https://osv.dev/vulnerability/CVE-2025-3693

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-3693/
Summaries are generated and may contain mistakes; the official description above is the record.