# CVE-2025-29387: Memory corruption in n/a

> A stack overflow in the Tenda AC9 router allows remote attackers to execute arbitrary code via the wanSpeed parameter.

- **Severity:** High 7.1 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 14 Mar 2025
- **Updated:** 17 Mar 2025
- **Also known as:** GHSA-54v8-qjwx-hj66

## What is CVE-2025-29387?

CVE-2025-29387 is a high-severity memory corruption vulnerability in Tenda Ac9 Firmware, published on 14 Mar 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

In Tenda AC9 v1.0 V15.03.05.14_multi, the wanSpeed parameter of /goform/AdvSetMacMtuWan has a stack overflow vulnerability, which can lead to remote arbitrary code execution.

Weakness: CWE-787 (Out-of-bounds Write), CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2025-29387?

It affects 1 product.


Products: Tenda Ac9 Firmware.

## How do I fix CVE-2025-29387?

No fix has been published for CVE-2025-29387 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-29387 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-29387 exists.

## Other vulnerabilities in Tenda Ac9 Firmware

- [CVE-2025-45042](https://insights.sbomify.com/CVE-2025-45042/): Command injection in n/a (critical 9.8)
- [CVE-2025-44872](https://insights.sbomify.com/CVE-2025-44872/): Command injection in n/a (critical 9.8)
- [CVE-2025-44877](https://insights.sbomify.com/CVE-2025-44877/): Command injection in n/a (critical 9.8)
- [CVE-2025-45427](https://insights.sbomify.com/CVE-2025-45427/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-45428](https://insights.sbomify.com/CVE-2025-45428/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-29387 and fix it if it is affected.

What it is: CVE-2025-29387 is a high-severity memory corruption vulnerability in Tenda Ac9 Firmware, published on 14 Mar 2025. Any signed-in user can exploit it over the network, 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-2025-29387 exists.

Affected product: Tenda Ac9 Firmware. 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-2025-29387/ (Markdown: https://insights.sbomify.com/CVE-2025-29387/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-29387
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-29387
- OSV: https://osv.dev/vulnerability/CVE-2025-29387

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-29387/
Summaries are generated and may contain mistakes; the official description above is the record.