# CVE-2025-11123: Tenda AC18 saveAutoQos stack-based overflow

> Remote attackers can trigger a stack-based buffer overflow in the Tenda AC18 router via the saveAutoQos endpoint, 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:** 28 Sep 2025
- **Updated:** 29 Sep 2025
- **Also known as:** GHSA-rp44-fr37-g447

## What is CVE-2025-11123?

CVE-2025-11123 is a high-severity memory corruption vulnerability in Tenda Ac18 Firmware, published on 28 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A flaw has been found in Tenda AC18 15.03.05.19. This impacts an unknown function of the file /goform/saveAutoQos. This manipulation of the argument enable causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been published 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-2025-11123?

It affects 1 product.


Products: Tenda Ac18 Firmware.

## How do I fix CVE-2025-11123?

No fix has been published for CVE-2025-11123 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-11123 being exploited?

There is no known exploitation of CVE-2025-11123 in the wild and no public exploit code.

## Other vulnerabilities in Tenda Ac18 Firmware

- [CVE-2024-57575](https://insights.sbomify.com/CVE-2024-57575/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-57579](https://insights.sbomify.com/CVE-2024-57579/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-57580](https://insights.sbomify.com/CVE-2024-57580/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-57581](https://insights.sbomify.com/CVE-2024-57581/): Memory corruption in n/a (critical 9.8)
- [CVE-2024-57582](https://insights.sbomify.com/CVE-2024-57582/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-11123 and fix it if it is affected.

What it is: CVE-2025-11123 is a high-severity memory corruption vulnerability in Tenda Ac18 Firmware, published on 28 Sep 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-11123 in the wild and no public exploit code.

Affected product: Tenda Ac18 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-2025-11123/ (Markdown: https://insights.sbomify.com/CVE-2025-11123/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-11123
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-11123
- OSV: https://osv.dev/vulnerability/CVE-2025-11123

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-11123/
Summaries are generated and may contain mistakes; the official description above is the record.