What’s Vulnerable › Vulnerabilities

CVE-2026-35019: NetComm NF20MESH < R6B032 Hardcoded AES Key Authentication Bypass

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% 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-321

Description

NetComm NF20MESH routers running firmware R6B031 and earlier contain an authentication bypass vulnerability that allows unauthenticated attackers to gain administrative access by exploiting a hardcoded AES-256 key used to encrypt session cookies for the web management interface. Attackers can forge a valid encrypted session cookie using the shared hardcoded key and bypass authentication checks to obtain full administrative control of the management interface while any legitimate administrator session is active.

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-authentication-bypass
• 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-hardcoded-aes-key-authentication-bypass

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