# CVE-2022-24355: Memory corruption in TL-WR940N

> Network-adjacent attackers can execute arbitrary code with root privileges on TP-Link routers via a stack-based buffer overflow in file name parsing.

- **Severity:** High 8.8 (`CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Feb 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-qpq6-p42w-r7mg

## What is CVE-2022-24355?

CVE-2022-24355 is a high-severity memory corruption vulnerability in TP-Link TL-WR940N, published on 18 Feb 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link TL-WR940N 3.20.1 Build 200316 Rel.34392n (5553) routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of file name extensions. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-13910.

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

## Which versions are affected by CVE-2022-24355?

It affects 1 product.


Products: Tp-Link Tl-Wr940n Firmware.

## How do I fix CVE-2022-24355?

No fix has been published for CVE-2022-24355 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-24355 being exploited?

There is no known exploitation of CVE-2022-24355 in the wild and no public exploit code.

Public exploit code:

- https://github.com/ExLuck/CVE-2022-24355 (github_poc): https://github.com/ExLuck/CVE-2022-24355
- Tplink wr841 v10 rce exploit without authorisation  (github_poc): https://github.com/ilizavr/CVE-2022-24355

## Other vulnerabilities in TP-Link TL-WR940N

- [CVE-2023-36355](https://insights.sbomify.com/CVE-2023-36355/): Memory corruption in n/a (critical 9.9)
- [CVE-2019-6989](https://insights.sbomify.com/CVE-2019-6989/): Memory corruption in n/a (high 8.8)
- [CVE-2026-11409](https://insights.sbomify.com/CVE-2026-11409/): OS Command Injection in IPv6 PPPoE Configuration in TP-Link TL-WR940N (high 8.5)
- [CVE-2026-11410](https://insights.sbomify.com/CVE-2026-11410/): OS Command Injection in BigPond Cable (BPA) Configuration in TP-Link TL-WR940N (high 8.5)
- [CVE-2025-6151](https://insights.sbomify.com/CVE-2025-6151/): TP-Link TL-WR940N, TL-WR841N WanSlaacCfgRpm.htm buffer overflow (high 8.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-24355 and fix it if it is affected.

What it is: CVE-2022-24355 is a high-severity memory corruption vulnerability in TP-Link TL-WR940N, published on 18 Feb 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-24355 in the wild and no public exploit code.

Affected product: TP-Link TL-WR940N. 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-2022-24355/ (Markdown: https://insights.sbomify.com/CVE-2022-24355/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-24355
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-24355
- OSV: https://osv.dev/vulnerability/CVE-2022-24355

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-24355/
Summaries are generated and may contain mistakes; the official description above is the record.