# CVE-2021-45512: Weak cryptography in n/a

> NETGEAR routers use weak cryptography, potentially allowing attackers to bypass security controls or decrypt sensitive data.

- **Severity:** High 8.6 (`CVSS:3.1/AC:L/AV:N/A:L/C:H/I:L/PR:N/S:U/UI:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Dec 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-59h7-2c4x-36qm

## What is CVE-2021-45512?

CVE-2021-45512 is a high-severity vulnerability in Netgear D7000 Firmware, published on 26 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Certain NETGEAR devices are affected by weak cryptography. This affects D7000v2 before 1.0.0.62, D8500 before 1.0.3.50, EX3700 before 1.0.0.84, EX3800 before 1.0.0.84, EX6120 before 1.0.0.54, EX6130 before 1.0.0.36, EX7000 before 1.0.1.90, R6250 before 1.0.4.42, R6400v2 before 1.0.4.98, R6700v3 before 1.0.4.98, R6900P before 1.3.2.124, R7000 before 1.0.11.106, R7000P before 1.3.2.124, R7100LG before 1.0.0.56, R7900 before 1.0.4.26, R8000 before 1.0.4.58, R8300 before 1.0.2.134, R8500 before 1.0.2.134, RS400 before 1.5.0.48, WNR3500Lv2 before 1.2.0.62, and XR300 before 1.0.3.50.

Weakness: CWE-327 (Use of a Broken or Risky Cryptographic Algorithm)

## Which versions are affected by CVE-2021-45512?

It affects 21 products.


Products: Netgear D7000 Firmware, Netgear D8500 Firmware, Netgear Ex3700 Firmware, Netgear Ex3800 Firmware, Netgear Ex6120 Firmware, Netgear Ex6130 Firmware, Netgear Ex7000 Firmware, Netgear R6250 Firmware, Netgear R6400 Firmware, Netgear R6700 Firmware, Netgear R6900p Firmware, Netgear R7000 Firmware, Netgear R7000p Firmware, Netgear R7100lg Firmware, Netgear R7900 Firmware, Netgear R8000 Firmware, Netgear R8300 Firmware, Netgear R8500 Firmware, Netgear Rs400 Firmware, Netgear Wnr3500l Firmware and 1 more.

## How do I fix CVE-2021-45512?

No fix has been published for CVE-2021-45512 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-45512 being exploited?

There is no known exploitation of CVE-2021-45512 in the wild and no public exploit code.

## Other vulnerabilities in Netgear D7000 Firmware

- [CVE-2021-45497](https://insights.sbomify.com/CVE-2021-45497/): Auth bypass in n/a (critical 9.4)
- [CVE-2021-45496](https://insights.sbomify.com/CVE-2021-45496/): Auth bypass in n/a (critical 9.1)
- [CVE-2018-21169](https://insights.sbomify.com/CVE-2018-21169/): Misconfiguration in n/a (high 8.8)
- [CVE-2017-18791](https://insights.sbomify.com/CVE-2017-18791/): Cross-site request forgery in n/a (high 8.8)
- [CVE-2017-18843](https://insights.sbomify.com/CVE-2017-18843/): Information disclosure in n/a (high 8.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-45512 and fix it if it is affected.

What it is: CVE-2021-45512 is a high-severity vulnerability in Netgear D7000 Firmware, published on 26 Dec 2021. 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-2021-45512 in the wild and no public exploit code.

Affected product: Netgear D7000 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-2021-45512/ (Markdown: https://insights.sbomify.com/CVE-2021-45512/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-45512
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-45512
- OSV: https://osv.dev/vulnerability/CVE-2021-45512

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-45512/
Summaries are generated and may contain mistakes; the official description above is the record.