# CVE-2019-20657: Memory corruption in n/a

> An authenticated user can trigger a buffer overflow in NETGEAR routers, potentially allowing arbitrary code execution.

- **Severity:** High 8.0 (`CVSS:3.0/AC:L/AV:A/A:H/C:H/I:H/PR:L/S:U/UI:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Apr 2020
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-45c5-53rx-cg43

## What is CVE-2019-20657?

CVE-2019-20657 is a high-severity memory corruption vulnerability in Netgear D6200 Firmware, published on 15 Apr 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Certain NETGEAR devices are affected by a buffer overflow by an authenticated user. This affects D6200 before 1.1.00.36, D7000 before 1.0.1.74, PR2000 before 1.0.0.28, R6020 before 1.0.0.42, R6080 before 1.0.0.42, R6050 before 1.0.1.24, JR6150 before 1.0.1.24, R6120 before 1.0.0.48, R6220 before 1.1.0.86, R6230 before 1.1.0.86, R6260 before 1.1.0.64, R6700v2 before 1.2.0.62, R6800 before 1.2.0.62, R6900v2 before 1.2.0.62, and WNR2020 before 1.1.0.62.

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

## Which versions are affected by CVE-2019-20657?

It affects 15 products.


Products: Netgear D6200 Firmware, Netgear D7000 Firmware, Netgear Jr6150 Firmware, Netgear Pr2000 Firmware, Netgear R6020 Firmware, Netgear R6050 Firmware, Netgear R6080 Firmware, Netgear R6120 Firmware, Netgear R6220 Firmware, Netgear R6230 Firmware, Netgear R6260 Firmware, Netgear R6700 Firmware, Netgear R6800 Firmware, Netgear R6900 Firmware, Netgear Wnr2020 Firmware.

## How do I fix CVE-2019-20657?

No fix has been published for CVE-2019-20657 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-20657 being exploited?

There is no known exploitation of CVE-2019-20657 in the wild and no public exploit code.

## Other vulnerabilities in Netgear D6200 Firmware

- [CVE-2020-26908](https://insights.sbomify.com/CVE-2020-26908/): Auth bypass in n/a (critical 9.4)
- [CVE-2017-18716](https://insights.sbomify.com/CVE-2017-18716/): Memory corruption in n/a (high 8.8)
- [CVE-2017-18717](https://insights.sbomify.com/CVE-2017-18717/): Memory corruption in n/a (high 8.8)
- [CVE-2017-18718](https://insights.sbomify.com/CVE-2017-18718/): Memory corruption in n/a (high 8.8)
- [CVE-2017-18719](https://insights.sbomify.com/CVE-2017-18719/): Memory corruption in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-20657 and fix it if it is affected.

What it is: CVE-2019-20657 is a high-severity memory corruption vulnerability in Netgear D6200 Firmware, published on 15 Apr 2020. 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-2019-20657 in the wild and no public exploit code.

Affected product: Netgear D6200 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-2019-20657/ (Markdown: https://insights.sbomify.com/CVE-2019-20657/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-20657
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-20657
- OSV: https://osv.dev/vulnerability/CVE-2019-20657

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-20657/
Summaries are generated and may contain mistakes; the official description above is the record.