# CVE-2021-34977: Auth bypass in R7000

> Network-adjacent attackers can bypass authentication to reset the admin password on NETGEAR R7000 routers via SOAP requests.

- **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:** 13 Jan 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-6r85-9phq-3c46

## What is CVE-2021-34977?

CVE-2021-34977 is a high-severity authentication bypass vulnerability in Netgear R7000 Firmware, published on 13 Jan 2022. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R7000 1.0.11.116_10.2.100 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of SOAP requests. The issue results from the lack of proper authentication verification before performing a password reset. An attacker can leverage this vulnerability to reset the admin password. Was ZDI-CAN-13483.

Weakness: CWE-287 (Improper Authentication), CWE-288 (Authentication Bypass Using an Alternate Path or Channel)

## Which versions are affected by CVE-2021-34977?

It affects 1 product.


Products: Netgear R7000 Firmware.

## How do I fix CVE-2021-34977?

No fix has been published for CVE-2021-34977 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-34977 being exploited?

There is no known exploitation of CVE-2021-34977 in the wild and no public exploit code.

## Other vulnerabilities in Netgear R7000 Firmware

- [CVE-2022-37235](https://insights.sbomify.com/CVE-2022-37235/): Memory corruption in n/a (critical 9.8)
- [CVE-2021-31802](https://insights.sbomify.com/CVE-2021-31802/): Memory corruption in n/a (high 8.8)
- [CVE-2024-35520](https://insights.sbomify.com/CVE-2024-35520/): Command injection in n/a (high 8.4)
- [CVE-2022-37234](https://insights.sbomify.com/CVE-2022-37234/): Memory corruption in n/a (high 7.8)
- [CVE-2019-20758](https://insights.sbomify.com/CVE-2019-20758/): Memory corruption in n/a (high 7.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-34977 and fix it if it is affected.

What it is: CVE-2021-34977 is a high-severity authentication bypass vulnerability in Netgear R7000 Firmware, published on 13 Jan 2022. 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-2021-34977 in the wild and no public exploit code.

Affected product: Netgear R7000 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-2021-34977/ (Markdown: https://insights.sbomify.com/CVE-2021-34977/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-34977
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-34977
- OSV: https://osv.dev/vulnerability/CVE-2021-34977

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-34977/
Summaries are generated and may contain mistakes; the official description above is the record.