CVE-2026-76071
NC6326/100
exploitation likelihood
CVSS9.3
EPSS1.1%
KEVNone
Netis NC63 firmware through V3.0.0.3327 contains a stack-based buffer overflow vulnerability that allows unauthenticated remote attackers to overwrite saved stack state by supplying an oversized destHost parameter to the ipFilterList=mod action in netis.cgi. Attackers can exploit widthless sscanf conversions that copy user-supplied input into fixed-size stack buffers before authentication is verified, achieving remote code execution as root due to the Boa web server executing the CGI environment
EPSS 0.011 (probability of exploitation) · CVSS base 9.3 · 1 public PoC/exploit reference(s) available
Public PoC / Exploit1
Defensive review only — these references demonstrate exploitability.
References4