CVE-2021-27254 Hardcoded credentials in R7800
Network-adjacent attackers can bypass authentication and execute arbitrary code as root on NETGEAR R7800 routers due to a hard-coded encryption key.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-27254?
CVE-2021-27254 is a medium-severity vulnerability in Netgear D7800 Firmware, published on 5 Mar 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R7800. Authentication is not required to exploit this vulnerability. The specific flaw exists within the apply_save.cgi endpoint. This issue results from the use of hard-coded encryption key. An attacker can leverage this vulnerability to execute arbitrary code in the context of root. Was ZDI-CAN-12287.
Which versions are affected by CVE-2021-27254?
It affects 43 products.
Products include Netgear Br200 Firmware, Netgear Br500 Firmware, Netgear D7800 Firmware, Netgear Ex6100v2 Firmware, Netgear Ex6150v2 Firmware, Netgear Ex6250 Firmware and 37 more.
How do I fix CVE-2021-27254?
No fix has been published for CVE-2021-27254 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-27254 being exploited?
There is no known exploitation of CVE-2021-27254 in the wild and no public exploit code.
Other vulnerabilities in Netgear D7800 Firmware
Sources
Also known as GHSA-qxg5-9hcj-qp59.