# CVE-2021-45526: Memory corruption in n/a

> Authenticated attackers can exploit a buffer overflow in NETGEAR routers to execute arbitrary code or escalate privileges.

- **Severity:** High 7.3 (`CVSS:3.1/AC:L/AV:L/A:H/C:L/I:L/PR:H/S:C/UI:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Dec 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-c8w9-7pxw-2m9j

## What is CVE-2021-45526?

CVE-2021-45526 is a high-severity memory corruption vulnerability in Netgear R6400 Firmware, published on 26 Dec 2021. 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 EX6000 before 1.0.0.38, EX6120 before 1.0.0.48, EX6130 before 1.0.0.30, R6300v2 before 1.0.4.52, R6400 before 1.0.1.52, R7000 before 1.0.11.126, R7900 before 1.0.4.30, R8000 before 1.0.4.52, R7000P before 1.3.2.124, R8000P before 1.4.1.50, RAX80 before 1.0.3.88, R6900P before 1.3.2.124, R7900P before 1.4.1.50, and RAX75 before 1.0.3.88.

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

## Which versions are affected by CVE-2021-45526?

It affects 14 products.


Products: Netgear Ex6000 Firmware, Netgear Ex6120 Firmware, Netgear Ex6130 Firmware, Netgear R6300v2 Firmware, Netgear R6400 Firmware, Netgear R6900p Firmware, Netgear R7000 Firmware, Netgear R7000p Firmware, Netgear R7900 Firmware, Netgear R7900p Firmware, Netgear R8000 Firmware, Netgear R8000p Firmware, Netgear Rax75 Firmware, Netgear Rax80 Firmware.

## How do I fix CVE-2021-45526?

No fix has been published for CVE-2021-45526 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-45526 being exploited?

There is no known exploitation of CVE-2021-45526 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-45526 and fix it if it is affected.

What it is: CVE-2021-45526 is a high-severity memory corruption vulnerability in Netgear R6400 Firmware, published on 26 Dec 2021. 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-2021-45526 in the wild and no public exploit code.

Affected product: Netgear R6400 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-2021-45526/ (Markdown: https://insights.sbomify.com/CVE-2021-45526/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-45526
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-45526
- OSV: https://osv.dev/vulnerability/CVE-2021-45526

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-45526/
Summaries are generated and may contain mistakes; the official description above is the record.