CVE-2020-36963: Intelbras Router RF 301K 1.1.2 - Authentication Bypass

Published Jan 28, 2026
·
Updated

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.

Affected Software

1 affected component
Intelbras Router RF 301K

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Intelbras Router RF 301K to a version that resolves this vulnerability.

    Fixed in 1.1.2

Event History

Jan 28, 2026
CVE Published
via MITRE·05:35 PM
Data Sourced
via MITRE·05:35 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·06:16 PM
DescriptionSeverityWeakness
Mar 2, 58047
Event
via NVD·05:34 PM

Frequently Asked Questions

1

What is the severity of CVE-2020-36963?

CVE-2020-36963 is classified as a critical vulnerability due to its ability to allow unauthenticated attackers to access sensitive configuration files.

2

How do I fix CVE-2020-36963?

To fix CVE-2020-36963, update the firmware of the Intelbras Router RF 301K to the latest version provided by the manufacturer.

3

What does CVE-2020-36963 allow an attacker to do?

CVE-2020-36963 allows an attacker to bypass authentication and download sensitive router configuration files.

4

Which device is affected by CVE-2020-36963?

CVE-2020-36963 affects the Intelbras Router RF 301K running firmware version 1.1.2.

5

How can I identify if my router is vulnerable to CVE-2020-36963?

You can identify if your router is vulnerable to CVE-2020-36963 by checking if it is running firmware version 1.1.2 or lower.

Contact

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