NetComm Wireless Pty NF20MESH prior R6B032 Shell Command dalStorage_addUserAccount os command injection

Summaryinfo

A vulnerability identified as critical has been detected in NetComm Wireless Pty NF20MESH. This affects the function dalStorage_addUserAccount of the component Shell Command Handler. This manipulation causes os command injection. This vulnerability appears as CVE-2026-35018. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in NetComm Wireless Pty NF20MESH. It has been declared as critical. Affected by this vulnerability is the function dalStorage_addUserAccount of the component Shell Command Handler. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was presented by Brendan Scarvell. The advisory is shared at signal11.io. This vulnerability is known as CVE-2026-35018 since 03/31/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1202 for this issue.

Upgrading to version R6B032 eliminates this vulnerability.

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Vendor

• NetComm Wireless Pty

Name

• NF20MESH

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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