# CVE-2019-13268: Information disclosure in n/a

> Attackers can leak data between host and guest networks via ARP forwarding, bypassing network isolation on TP-Link routers.

- **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:** 27 Aug 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-xfj7-4x95-qr79

## What is CVE-2019-13268?

CVE-2019-13268 is a high-severity vulnerability in n/a, published on 27 Aug 2019. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

TP-Link Archer C3200 V1 and Archer C2 V1 devices have Insufficient Compartmentalization between a host network and a guest network that are established by the same device. They forward ARP requests, which are sent as broadcast packets, between the host and the guest networks. To use this leakage as a direct covert channel, the sender can trivially issue an ARP request to an arbitrary computer on the network. (In general, some routers restrict ARP forwarding only to requests destined for the network's subnet mask, but these routers did not restrict this traffic in any way. Depending on this factor, one must use either the lower 8 bits of the IP address, or the entire 32 bits, as the data payload.)

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2019-13268?

It affects 2 products.


Products: Tp-Link Archer C2 V1 Firmware, Tp-Link Archer C3200 V1 Firmware.

## How do I fix CVE-2019-13268?

No fix has been published for CVE-2019-13268 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-13268 being exploited?

There is no known exploitation of CVE-2019-13268 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2019-13266](https://insights.sbomify.com/CVE-2019-13266/): Information disclosure in n/a (high 8.8)
- [CVE-2019-13267](https://insights.sbomify.com/CVE-2019-13267/): Information disclosure in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-13268 and fix it if it is affected.

What it is: CVE-2019-13268 is a high-severity vulnerability in n/a, published on 27 Aug 2019. 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-2019-13268 in the wild and no public exploit code.

Affected product: n/a. 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-2019-13268/ (Markdown: https://insights.sbomify.com/CVE-2019-13268/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-13268
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-13268
- OSV: https://osv.dev/vulnerability/CVE-2019-13268

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-13268/
Summaries are generated and may contain mistakes; the official description above is the record.