CVE-2021-27251 Other in R7800
Network-adjacent attackers can execute arbitrary code as root on NETGEAR R7800 routers due to insecure firmware update protocol fallback.
- 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-2021-27251?
CVE-2021-27251 is a high-severity vulnerability in Netgear D7800 Firmware, published on 14 Apr 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 execute arbitrary code on affected installations of NETGEAR Nighthawk R7800. Authentication is not required to exploit this vulnerability The specific flaw exists within handling of firmware updates. The issue results from a fallback to a insecure protocol to deliver updates. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12308.
Weakness: CWE-319
Which versions are affected by CVE-2021-27251?
It affects 43 products.
Products include Netgear Br200 Firmware, Netgear Br500 Firmware, Netgear D7800 Firmware, Netgear Ex6100v2 Firmware, Netgear Ex6150 Firmware, Netgear Ex6250 Firmware and 37 more.
How do I fix CVE-2021-27251?
No fix has been published for CVE-2021-27251 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-27251 being exploited?
There is no known exploitation of CVE-2021-27251 in the wild and no public exploit code.
Other vulnerabilities in Netgear D7800 Firmware
Sources
Also known as GHSA-2wc2-8hhf-wr42.