CVE-2020-36963 Intelbras Router RF 301K 1.1.2 - Authentication Bypass
Unauthenticated attackers can download sensitive router configuration files via a specific HTTP request, exposing network settings.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-36963?
CVE-2020-36963 is a high-severity authentication bypass vulnerability in Intelbras Router RF 301K, published on 28 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-306
Which versions are affected by CVE-2020-36963?
How do I fix CVE-2020-36963?
No fix has been published for CVE-2020-36963 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2020-36963 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-36963 exists.
Sources
Also known as GHSA-mgpr-67wh-564q.