# CVE-2025-11549: Tenda W12 HTTP Request modules wifiMacFilterSet stack-based overflow

> Remote attackers can trigger a stack-based buffer overflow in the Tenda W12 router's HTTP handler, potentially leading to code execution or service disruption.

- **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/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:** 9 Oct 2025
- **Updated:** 24 Feb 2026
- **Also known as:** GHSA-4vvc-4999-7hh6

## What is CVE-2025-11549?

CVE-2025-11549 is a high-severity memory corruption vulnerability in Tenda W12, published on 9 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability has been found in Tenda W12 3.0.0.6(3948). The affected element is the function wifiMacFilterSet of the file /goform/modules of the component HTTP Request Handler. The manipulation of the argument mac leads to stack-based buffer overflow. The attack is possible to be carried out 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-2025-11549?

It affects 1 product.


Products: Tenda W12 Firmware.

## How do I fix CVE-2025-11549?

No fix has been published for CVE-2025-11549 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-11549 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-11549 exists.

## Other vulnerabilities in Tenda W12

- [CVE-2025-3693](https://insights.sbomify.com/CVE-2025-3693/): Tenda W12 httpd cgiWifiRadioSet 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-2025-11549 and fix it if it is affected.

What it is: CVE-2025-11549 is a high-severity memory corruption vulnerability in Tenda W12, published on 9 Oct 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-2025-11549 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-2025-11549/ (Markdown: https://insights.sbomify.com/CVE-2025-11549/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-11549
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-11549
- OSV: https://osv.dev/vulnerability/CVE-2025-11549

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-11549/
Summaries are generated and may contain mistakes; the official description above is the record.