KCodes NetUSB bug exposes millions of routers to RCE attacks


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Aug 17, 2014
A high-severity remote code execution flaw tracked as CVE-2021-45388 has been discovered in the KCodes NetUSB kernel module, used by millions of router devices from various vendors.

Successfully exploiting this flaw would allow a remote threat actor to execute code in the kernel, and although some restrictions apply, the impact is broad and could be severe.

The vulnerability discovery comes from researchers at SentinelLabs who shared their technical report with Bleeping Computer before publication.
Netgear released a security update to patch CVE-2021-45388 on affected and supported products on December 14, 2021.
According to the security advisory published on December 20, 2021, the affected Netgear products are the following:
  • D7800 fixed in firmware version
  • R6400v2 fixed in firmware version
  • R6700v3 fixed in firmware version

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