# CVE-2020-35782: Missing authorization in n/a

> Remote attackers can bypass access controls to write arbitrary data to internal memory via the TFTP firmware update mechanism on affected NETGEAR switches.

- **Severity:** High 8.1 (`CVSS:3.1/AC:L/AV:A/A:H/C:N/I:H/PR:N/S:U/UI:N`)
- **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:** 29 Dec 2020
- **Updated:** 4 Aug 2024
- **Also known as:** CVE-2020-35232, GHSA-j8r6-c45m-jv6q

## What is CVE-2020-35782?

CVE-2020-35782 is a high-severity missing authorization vulnerability in n/a, published on 29 Dec 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 lack of access control at the function level. This affects JGS516PE before 2.6.0.48, JGS524Ev2 before 2.6.0.48, JGS524PE before 2.6.0.48, and GS116Ev2 before 2.6.0.48. The TFTP firmware update mechanism does not properly implement firmware validations, allowing remote attackers to write arbitrary data to internal memory.

## Which versions are affected by CVE-2020-35782?

It affects 4 products.


Products: Netgear Gs116e Firmware, Netgear Jgs516pe Firmware, Netgear Jgs524e Firmware, Netgear Jgs524pe Firmware.

## How do I fix CVE-2020-35782?

No fix has been published for CVE-2020-35782 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-35782 being exploited?

There is no known exploitation of CVE-2020-35782 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2020-35221](https://insights.sbomify.com/CVE-2020-35221/): Weak cryptography in n/a (high 8.8)
- [CVE-2020-35223](https://insights.sbomify.com/CVE-2020-35223/): Cross-site request forgery in n/a (high 8.8)
- [CVE-2020-35229](https://insights.sbomify.com/CVE-2020-35229/): Auth bypass in n/a (high 8.8)
- [CVE-2020-35231](https://insights.sbomify.com/CVE-2020-35231/): Auth bypass in n/a (high 8.8)
- [CVE-2020-35801](https://insights.sbomify.com/CVE-2020-35801/): Misconfiguration in n/a (high 8.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-35782 and fix it if it is affected.

What it is: CVE-2020-35782 is a high-severity missing authorization vulnerability in n/a, published on 29 Dec 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-2020-35782 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-2020-35782/ (Markdown: https://insights.sbomify.com/CVE-2020-35782/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-35782
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-35782
- OSV: https://osv.dev/vulnerability/CVE-2020-35782

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-35782/
Summaries are generated and may contain mistakes; the official description above is the record.