CVE-2026-35019
NetComm NF20MESH < R6B032 Hardcoded AES Key Authentication Bypass
- State
- Published
- Severity
- 9.2 Critical
- Published
- Jun 23, 2026
- Updated
- Jul 14, 2026
- Reserved
- Mar 31, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.2 Critical | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-321 Use of Hard-coded Cryptographic Key
Affected Products
| Product | Versions |
|---|---|
NF20MESHNetComm Wireless Pty Ltd |
|
References
- https://signal11.io/advisories/netcomm-nf20-mesh-authentication-bypasstechnical-description
- https://support.netcommwireless.com/api/Media/Firmware/4407c21d-e990-49a4-9754-b72475f20c76?Product=NF20MESH%20Release%20Notes.pdfrelease-notespatch
- https://support.netcommwireless.com/products/nf20mesh#Firmwareproduct
- https://www.vulncheck.com/advisories/netcomm-nf20mesh-r6b032-hardcoded-aes-key-authentication-bypassthird-party-advisory
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