CVE-2026-35019 json
NetComm NF20MESH < R6B032 Hardcoded AES Key Authentication Bypass
published 2026-06-23 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-38453
- cvss
- 8.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 57%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- NetComm Wireless Pty Ltd NF20MESH R6B032
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 4 mo ago
Exploit prediction
0.81% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.2 | 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 |
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 9.2 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- NetComm Wireless Pty Ltd NF20MESH
Classification
- Weakness
-
- CWE-321 Use of Hard-coded Cryptographic Key
References
-
support.netcommwireless.com
/api/Media/Firmware/4407c21d-e990-49a4-9754-b72475f20c76?Product=NF20MESH%20Release%20Notes.pdf
release-notes, patch
-
signal11.io
/advisories/netcomm-nf20-mesh-authentication-bypass
technical-description
-
support.netcommwireless.com
/products/nf20mesh#Firmware
product
-
vulncheck.com
/advisories/netcomm-nf20mesh-r6b032-hardcoded-aes-key-authentication-bypass
third-party-advisory
Sources
- CVE List CVE-2026-35019
- NVD CVE-2026-35019
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