# CVE-2023-40798: Memory corruption in n/a

> An authenticated attacker can trigger a stack overflow in Tenda AC23 routers via specific form functions, potentially leading to code execution.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 25 Aug 2023
- **Updated:** 2 Oct 2024
- **Also known as:** GHSA-mmrw-88mx-92rq

## What is CVE-2023-40798?

CVE-2023-40798 is a high-severity memory corruption vulnerability in n/a, published on 25 Aug 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

In Tenda AC23 v16.03.07.45_cn, the formSetIPv6status and formGetWanParameter functions do not authenticate user input parameters, resulting in a post-authentication stack overflow vulnerability.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2023-40798?

It affects 1 product.


Products: Tenda Ac23 Firmware.

## How do I fix CVE-2023-40798?

No fix has been published for CVE-2023-40798 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-40798 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-40798 exists.

## Other vulnerabilities in n/a

- [CVE-2023-40799](https://insights.sbomify.com/CVE-2023-40799/): Memory corruption in n/a (critical 9.8)
- [CVE-2022-43101](https://insights.sbomify.com/CVE-2022-43101/): Memory corruption in n/a (critical 9.8)
- [CVE-2022-43102](https://insights.sbomify.com/CVE-2022-43102/): Memory corruption in n/a (critical 9.8)
- [CVE-2022-43103](https://insights.sbomify.com/CVE-2022-43103/): Memory corruption in n/a (critical 9.8)
- [CVE-2022-43104](https://insights.sbomify.com/CVE-2022-43104/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-40798 and fix it if it is affected.

What it is: CVE-2023-40798 is a high-severity memory corruption vulnerability in n/a, published on 25 Aug 2023. 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-2023-40798 exists.

Affected product: n/a. 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-2023-40798/ (Markdown: https://insights.sbomify.com/CVE-2023-40798/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-40798
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-40798
- OSV: https://osv.dev/vulnerability/CVE-2023-40798

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-40798/
Summaries are generated and may contain mistakes; the official description above is the record.