CVE-2021-27173 Auth bypass in n/a
An unauthenticated backdoor API on FiberHome routers disables the firewall and enables Telnet, allowing attackers to gain remote command-line access.
- 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-2021-27173?
CVE-2021-27173 is a high-severity authentication bypass vulnerability in n/a, published on 10 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered on FiberHome HG6245D devices through RP2613. There is a telnet?enable=0&key=calculated(BR0_MAC) backdoor API, without authentication, provided by the HTTP server. This will remove firewall rules and allow an attacker to reach the telnet server (used for the CLI).
Which versions are affected by CVE-2021-27173?
It affects 1 product.
Products include Fiberhome Hg6245d Firmware.
How do I fix CVE-2021-27173?
No fix has been published for CVE-2021-27173 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-2021-27173 being exploited?
There is no known exploitation of CVE-2021-27173 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-vr73-2fhc-cc9m.