# CVE-2023-36187: Memory corruption in n/a

> Remote unauthenticated attackers can execute arbitrary code on NETGEAR R6400v2 routers via a buffer overflow in the httpd service.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/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:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Sep 2023
- **Updated:** 1 Oct 2024
- **Also known as:** GHSA-qpcg-54gx-2mvc

## What is CVE-2023-36187?

CVE-2023-36187 is a critical memory corruption vulnerability in Netgear R6400 Firmware, published on 1 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Buffer Overflow vulnerability in NETGEAR R6400v2 before version 1.0.4.118, allows remote unauthenticated attackers to execute arbitrary code via crafted URL to httpd.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2023-36187?

It affects 15 products.


Products: Netgear Cbr40 Firmware, Netgear Lax20 Firmware, Netgear Mk62 Firmware, Netgear Mr60 Firmware, Netgear Ms60 Firmware, Netgear R6400 Firmware, Netgear R6400v2 Firmware, Netgear R6700v3 Firmware, Netgear R7000 Firmware, Netgear R7000p Firmware, Netgear Rax200 Firmware, Netgear Rax75 Firmware, Netgear Rax80 Firmware, Netgear Rbw30 Firmware, Netgear Rs400 Firmware.

## How do I fix CVE-2023-36187?

No fix has been published for CVE-2023-36187 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-36187 being exploited?

There is no known exploitation of CVE-2023-36187 in the wild and no public exploit code.

## Other vulnerabilities in Netgear R6400 Firmware

- [CVE-2021-45630](https://insights.sbomify.com/CVE-2021-45630/): Command injection in n/a (critical 10.0)
- [CVE-2021-45617](https://insights.sbomify.com/CVE-2021-45617/): Command injection in n/a (critical 9.8)
- [CVE-2021-45504](https://insights.sbomify.com/CVE-2021-45504/): Auth bypass in n/a (critical 9.6)
- [CVE-2021-45507](https://insights.sbomify.com/CVE-2021-45507/): Auth bypass in n/a (critical 9.6)
- [CVE-2021-45508](https://insights.sbomify.com/CVE-2021-45508/): Auth bypass in n/a (critical 9.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-36187 and fix it if it is affected.

What it is: CVE-2023-36187 is a critical memory corruption vulnerability in Netgear R6400 Firmware, published on 1 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-36187 in the wild and no public exploit code.

Affected product: Netgear R6400 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-2023-36187/ (Markdown: https://insights.sbomify.com/CVE-2023-36187/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-36187
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-36187
- OSV: https://osv.dev/vulnerability/CVE-2023-36187

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-36187/
Summaries are generated and may contain mistakes; the official description above is the record.