CVE-2022-4874: Netcommwireless NF20 Firmware

High severity, CVSS 7.5. EPSS: 11% chance of exploitation in the next 30 days.

Authentication bypass in Netcomm router models NF20MESH, NF20, and NL1902 allows an unauthenticated user to access content. In order to serve static content, the application performs a check for the existence of specific characters in the URL (.css, .png etc). If it exists, it performs a "fake login" to give the request an active session to load the file and not redirect to the login page.

Affected products

• Netcommwireless NF20 Firmware: before r6b025 (fixed in r6b025)
• Netcommwireless NF20MESH Firmware: before r6b025 (fixed in r6b025)
• Netcommwireless NL1902 Firmware: before r6b025 (fixed in r6b025)

Published 2023-01-11. Last modified 2026-06-17.