What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-23 · updated 2026-10-25
• Weakness: CWE-78

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.

Affected products

• NetComm Wireless Pty Ltd NF20MESH: before R6B032 — fixed in R6B032

How to fix

Upgrade to a fixed version: NetComm Wireless Pty Ltd NF20MESH R6B032. Check the vendor advisory for mitigations.

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
• https://signal11.io/advisories/netcomm-nf20-mesh-remote-code-execution

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