# CVE-2026-0403: Insufficient input validation in NETGEAR Orbi routers

> LAN attackers can execute OS commands on NETGEAR Orbi routers due to insufficient input validation, requiring vendor patches.

- **Severity:** Low 1.1 (`CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Amber`)
- **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:** 13 Jan 2026
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-52xc-q9g5-mc6m

## What is CVE-2026-0403?

CVE-2026-0403 is a low-severity command injection vulnerability in Netgear Rbr750 Firmware, published on 13 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

An insufficient input validation vulnerability in NETGEAR Orbi routers 
allows attackers connected to the router's LAN to execute OS command 
injections.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-0403?

It affects 10 products.


Products: Netgear Rbe970 Firmware, Netgear Rbe971 Firmware, Netgear Rbr750 Firmware, Netgear Rbr850 Firmware, Netgear Rbr860 Firmware, Netgear Rbre960 Firmware, Netgear Rbs750 Firmware, Netgear Rbs850 Firmware, Netgear Rbs860 Firmware, Netgear Rbse960 Firmware.

## How do I fix CVE-2026-0403?

No fix has been published for CVE-2026-0403 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-0403 being exploited?

There is no known exploitation of CVE-2026-0403 in the wild and no public exploit code.

## Other vulnerabilities in Netgear Rbr750 Firmware

- [CVE-2026-3088](https://insights.sbomify.com/CVE-2026-3088/): Unauthenticated users can disrupt router operation (medium 4.9)
- [CVE-2026-0414](https://insights.sbomify.com/CVE-2026-0414/): Insufficient Input Validation Allows Unauthorized Modification of Router Software in certain NETGEAR Routers (medium 4.3)
- [CVE-2026-0415](https://insights.sbomify.com/CVE-2026-0415/): Insufficient input validation vulnerability in certain Orbi routers (medium 4.3)
- [CVE-2026-0411](https://insights.sbomify.com/CVE-2026-0411/): A Sensitive Information Disclosure Vulnerability in NETGEAR Orbi Satellites (medium 4.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-0403 and fix it if it is affected.

What it is: CVE-2026-0403 is a low-severity command injection vulnerability in Netgear Rbr750 Firmware, published on 13 Jan 2026. 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-2026-0403 in the wild and no public exploit code.

Affected product: Netgear Rbr750 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-2026-0403/ (Markdown: https://insights.sbomify.com/CVE-2026-0403/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-0403
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-0403
- OSV: https://osv.dev/vulnerability/CVE-2026-0403

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-0403/
Summaries are generated and may contain mistakes; the official description above is the record.