Authentication Bypass in Intelbras Router RF 301K
CVE-2020-36963

8.7HIGH

Key Information:

Vendor

Intelbras

Status
Intelbras Router Rf 301k
Vendor
CVE Published:
28 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2020-36963?

The Intelbras Router RF 301K with firmware version 1.1.2 has a vulnerability that allows attackers to bypass authentication. By exploiting this flaw, unauthorized individuals can issue a specific HTTP GET request to access sensitive router configuration files without needing valid credentials. This could lead to unauthorized access to a network, impacting its security and integrity.

Affected Version(s)

Intelbras Router RF 301K firmware version 1.1.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2020-36963 - Proof of Concept

References

https://www.exploit-db.com/exploits/49126
exploit
https://www.intelbras.com/pt-br/
product
https://www.vulncheck.com/advisories/intelbras-router-rf-...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Kaio Amaral
.