CVE-2020-36963

HIGH 7.5

Intelbras Router RF 301K 1.1.2 - Authentication Bypass

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-306
Vendor	intelbras
Product	intelbras router rf 301k
Published	Jan 28, 2026
Last Updated	Apr 7, 2026

Stay Ahead of the Next One

Get instant alerts for intelbras intelbras router rf 301k

Be the first to know when new high vulnerabilities affecting intelbras intelbras router rf 301k are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

Intelbras / Intelbras Router RF 301K

firmware version 1.1.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

exploit-db.com: https://www.exploit-db.com/exploits/49126 intelbras.com: https://www.intelbras.com/pt-br/ vulncheck.com: https://www.vulncheck.com/advisories/intelbras-router-rf-k-authentication-bypass

Credits

Kaio Amaral