Intelbras Router RF 301K 1.1.2 - Authentication Bypass | Advisories

Advisories

Intelbras Router RF 301K 1.1.2 - Authentication Bypass

severity: high
date: January 28, 2026
Affecting: Intelbras Router RF 301K firmware version 1.1.2
CVE: CVE-2020-36963
CWE: CWE-306 Missing Authentication for Critical Function
CVSS: 8.7
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References: ExploitDB-49126
Intelbras Official Homepage
Credit: Kaio Amaral
Description: Intelbras Router RF 301K firmware version 1.1.2 contains an authentication bypass vulnerability that allows unauthenticated attackers to download router configuration files. Attackers can send a specific HTTP GET request to /cgi-bin/DownloadCfg/RouterCfm.cfg to retrieve sensitive router configuration without authentication.