# CVE-2023-43864: Memory corruption in n/a

> A buffer overflow in the D-Link DIR-619L router allows attackers to execute arbitrary code via the formSetWAN_Wizard55 function.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Sep 2023
- **Updated:** 23 Sep 2024
- **Also known as:** GHSA-w2g4-5x4v-rvp3

## What is CVE-2023-43864?

CVE-2023-43864 is a high-severity memory corruption vulnerability in Dlink Dir-619l Firmware, published on 28 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

D-Link DIR-619L B1 2.02 is vulnerable to Buffer Overflow via formSetWAN_Wizard55 function.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2023-43864?

It affects 1 product.


Products: Dlink Dir-619l Firmware.

## How do I fix CVE-2023-43864?

No fix has been published for CVE-2023-43864 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-43864 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-43864 exists.

## Other vulnerabilities in Dlink Dir-619l Firmware

- [CVE-2025-55599](https://insights.sbomify.com/CVE-2025-55599/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-55602](https://insights.sbomify.com/CVE-2025-55602/): Memory corruption in n/a (critical 9.8)
- [CVE-2025-55611](https://insights.sbomify.com/CVE-2025-55611/): Memory corruption in n/a (critical 9.8)
- [CVE-2023-43869](https://insights.sbomify.com/CVE-2023-43869/): Memory corruption in n/a (critical 9.8)
- [CVE-2020-19319](https://insights.sbomify.com/CVE-2020-19319/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-43864 and fix it if it is affected.

What it is: CVE-2023-43864 is a high-severity memory corruption vulnerability in Dlink Dir-619l Firmware, published on 28 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-43864 exists.

Affected product: Dlink Dir-619l 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-2023-43864/ (Markdown: https://insights.sbomify.com/CVE-2023-43864/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-43864
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-43864
- OSV: https://osv.dev/vulnerability/CVE-2023-43864

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-43864/
Summaries are generated and may contain mistakes; the official description above is the record.