# CVE-2021-45573: Memory corruption in n/a

> Unauthenticated attackers can trigger a stack-based buffer overflow in NETGEAR routers to execute arbitrary code.

- **Severity:** High 8.3 (`CVSS:3.1/AC:L/AV:A/A:L/C:H/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:** 26 Dec 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-r2vh-7p3c-jgwf

## What is CVE-2021-45573?

CVE-2021-45573 is a high-severity memory corruption vulnerability in Netgear R6260 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 stack-based buffer overflow by an unauthenticated attacker. This affects R6260 before 1.1.0.76, R6800 before 1.2.0.62, R6700v2 before 1.2.0.62, R6900v2 before 1.2.0.62, R7450 before 1.2.0.62, AC2100 before 1.2.0.62, AC2400 before 1.2.0.62, and AC2600 before 1.2.0.62.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2021-45573?

It affects 8 products.


Products: Netgear Ac2100 Firmware, Netgear Ac2400 Firmware, Netgear Ac2600 Firmware, Netgear R6260 Firmware, Netgear R6700 Firmware, Netgear R6800 Firmware, Netgear R6900 Firmware, Netgear R7450 Firmware.

## How do I fix CVE-2021-45573?

No fix has been published for CVE-2021-45573 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-45573 being exploited?

There is no known exploitation of CVE-2021-45573 in the wild and no public exploit code.

## Other vulnerabilities in Netgear R6260 Firmware

- [CVE-2021-38516](https://insights.sbomify.com/CVE-2021-38516/): Missing authorization in n/a (critical 10.0)
- [CVE-2021-29068](https://insights.sbomify.com/CVE-2021-29068/): Memory corruption in n/a (critical 9.9)
- [CVE-2020-35795](https://insights.sbomify.com/CVE-2020-35795/): Memory corruption in n/a (critical 9.8)
- [CVE-2020-35800](https://insights.sbomify.com/CVE-2020-35800/): Misconfiguration in n/a (critical 9.4)
- [CVE-2020-26927](https://insights.sbomify.com/CVE-2020-26927/): Auth bypass in n/a (critical 9.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-45573 and fix it if it is affected.

What it is: CVE-2021-45573 is a high-severity memory corruption vulnerability in Netgear R6260 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-2021-45573 in the wild and no public exploit code.

Affected product: Netgear R6260 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-2021-45573/ (Markdown: https://insights.sbomify.com/CVE-2021-45573/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-45573
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-45573
- OSV: https://osv.dev/vulnerability/CVE-2021-45573

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-45573/
Summaries are generated and may contain mistakes; the official description above is the record.