# CVE-2022-41140: Memory corruption in Multiple Routers

> Network-adjacent attackers can execute arbitrary code as root on D-Link routers via a stack buffer overflow in the lighttpd service.

- **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:** 26 Jan 2023
- **Updated:** 1 Apr 2025
- **Also known as:** GHSA-qcrm-3jcv-ppvq

## What is CVE-2022-41140?

CVE-2022-41140 is a high-severity memory corruption vulnerability in D-Link Multiple Routers, published on 26 Jan 2023. 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 multiple D-Link routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the lighttpd service, which listens on TCP port 80 by default. 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-13796.

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

## Which versions are affected by CVE-2022-41140?

It affects 3 products.


Products: Dlink Dir-867 Firmware, Dlink Dir-878 Firmware, Dlink Dir-882-Us Firmware.

## How do I fix CVE-2022-41140?

No fix has been published for CVE-2022-41140 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-41140 being exploited?

There is no known exploitation of CVE-2022-41140 in the wild and no public exploit code.

## Other vulnerabilities in D-Link Multiple Routers

- [CVE-2023-24762](https://insights.sbomify.com/CVE-2023-24762/): Command injection in n/a (critical 9.8)
- [CVE-2020-8863](https://insights.sbomify.com/CVE-2020-8863/): Auth bypass in Multiple Routers (high 8.8)
- [CVE-2020-8864](https://insights.sbomify.com/CVE-2020-8864/): Auth bypass in Multiple Routers (high 8.8)
- [CVE-2025-6334](https://insights.sbomify.com/CVE-2025-6334/): D-Link DIR-867 Query String strncpy stack-based overflow (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-41140 and fix it if it is affected.

What it is: CVE-2022-41140 is a high-severity memory corruption vulnerability in D-Link Multiple Routers, published on 26 Jan 2023. 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-2022-41140 in the wild and no public exploit code.

Affected product: D-Link Multiple Routers. 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-2022-41140/ (Markdown: https://insights.sbomify.com/CVE-2022-41140/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-41140
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-41140
- OSV: https://osv.dev/vulnerability/CVE-2022-41140

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-41140/
Summaries are generated and may contain mistakes; the official description above is the record.