# CVE-2021-45656: Code injection in n/a > Attackers can execute arbitrary code on vulnerable NETGEAR routers via server-side injection flaws. - **Severity:** High 7.1 (`CVSS:3.1/AC:L/AV:L/A:N/C:H/I:H/PR:L/S:U/UI:N`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **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-7mw2-5r6h-5932 ## What is CVE-2021-45656? CVE-2021-45656 is a high-severity code injection vulnerability in Netgear D6200 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 server-side injection. This affects D6200 before 1.1.00.38, D7000 before 1.0.1.78, R6020 before 1.0.0.48, R6080 before 1.0.0.48, R6050 before 1.0.1.26, JR6150 before 1.0.1.26, R6120 before 1.0.0.66, R6220 before 1.1.0.100, R6230 before 1.1.0.100, R6260 before 1.1.0.78, R6800 before 1.2.0.76, R6900v2 before 1.2.0.76, R6700v2 before 1.2.0.76, R7450 before 1.2.0.76, AC2100 before 1.2.0.76, AC2400 before 1.2.0.76, AC2600 before 1.2.0.76, RBK40 before 2.5.1.16, RBR40 before 2.5.1.16, RBS40 before 2.5.1.16, RBK20 before 2.5.1.16, RBR20 before 2.5.1.16, RBS20 before 2.5.1.16, RBK50 before 2.5.1.16, RBR50 before 2.5.1.16, RBS50 before 2.5.1.16, and RBS50Y before 2.6.1.40. Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component) ## Which versions are affected by CVE-2021-45656? It affects 27 products. Products: Netgear Ac2100 Firmware, Netgear Ac2400 Firmware, Netgear Ac2600 Firmware, Netgear D6200 Firmware, Netgear D7000 Firmware, Netgear Jr6150 Firmware, Netgear R6020 Firmware, Netgear R6050 Firmware, Netgear R6080 Firmware, Netgear R6120 Firmware, Netgear R6220 Firmware, Netgear R6230 Firmware, Netgear R6260 Firmware, Netgear R6700 Firmware, Netgear R6800 Firmware, Netgear R6900 Firmware, Netgear R7450 Firmware, Netgear Rbk20 Firmware, Netgear Rbk40 Firmware, Netgear Rbk50 Firmware and 7 more. ## How do I fix CVE-2021-45656? No fix has been published for CVE-2021-45656 yet. Limit exposure of the affected software until one is available. ## Is CVE-2021-45656 being exploited? There is no known exploitation of CVE-2021-45656 in the wild and no public exploit code. ## Other vulnerabilities in Netgear D6200 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-2021-45656 and fix it if it is affected. What it is: CVE-2021-45656 is a high-severity code injection vulnerability in Netgear D6200 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-2021-45656 in the wild and no public exploit code. Affected product: Netgear D6200 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-2021-45656/ (Markdown: https://insights.sbomify.com/CVE-2021-45656/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2021-45656 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-45656 - OSV: https://osv.dev/vulnerability/CVE-2021-45656 --- From sbomify Insights: https://insights.sbomify.com/CVE-2021-45656/ Summaries are generated and may contain mistakes; the official description above is the record.