# CVE-2024-1002: Totolink N200RE cstecgi.cgi setIpPortFilterRules stack-based overflow

> A remote attacker can trigger a stack-based buffer overflow in the router's CGI interface to potentially execute arbitrary code.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 Jan 2024
- **Updated:** 29 May 2025
- **Also known as:** GHSA-j8jv-qh5w-hrq5

## What is CVE-2024-1002?

CVE-2024-1002 is a high-severity memory corruption vulnerability in Totolink N200RE, published on 29 Jan 2024. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability classified as critical was found in Totolink N200RE 9.3.5u.6139_B20201216. Affected by this vulnerability is the function setIpPortFilterRules of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ePort leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-252271. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2024-1002?

It affects 1 product.


Products: Totolink N200re Firmware.

## How do I fix CVE-2024-1002?

No fix has been published for CVE-2024-1002 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-1002 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-1002 exists.

## Other vulnerabilities in Totolink N200RE

- [CVE-2024-0296](https://insights.sbomify.com/CVE-2024-0296/): Totolink N200RE cstecgi.cgi NTPSyncWithHost os command injection (high 7.3)
- [CVE-2024-0297](https://insights.sbomify.com/CVE-2024-0297/): Totolink N200RE cstecgi.cgi UploadFirmwareFile os command injection (high 7.3)
- [CVE-2024-0298](https://insights.sbomify.com/CVE-2024-0298/): Totolink N200RE cstecgi.cgi setDiagnosisCfg os command injection (high 7.3)
- [CVE-2024-0299](https://insights.sbomify.com/CVE-2024-0299/): Totolink N200RE cstecgi.cgi setTracerouteCfg os command injection (high 7.3)
- [CVE-2024-0997](https://insights.sbomify.com/CVE-2024-0997/): Totolink N200RE cstecgi.cgi setOpModeCfg stack-based overflow (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-1002 and fix it if it is affected.

What it is: CVE-2024-1002 is a high-severity memory corruption vulnerability in Totolink N200RE, published on 29 Jan 2024. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-1002 exists.

Affected product: Totolink N200RE. 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-2024-1002/ (Markdown: https://insights.sbomify.com/CVE-2024-1002/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-1002
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-1002
- OSV: https://osv.dev/vulnerability/CVE-2024-1002

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From sbomify Insights: https://insights.sbomify.com/CVE-2024-1002/
Summaries are generated and may contain mistakes; the official description above is the record.