GHSA-mx2q-89wp-jrvhCriticalCVSS 9.8
Netis NC63 firmware through V3.0.0.3327 contains a stack-based buffer overflow vulnerability that...
🔗 CVE IDs covered (1)
📋 Description
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 with root privileges.
🔗 References (6)
- https://nvd.nist.gov/vuln/detail/CVE-2026-76071
- https://github.com/ozcanpng/CVE-2026-76071
- https://ozcanpng.dev/blog/cve-2026-76071-netis-nc63-ipfilter-stack-buffer-overflow
- https://www.netis-systems.com/products/NC63.html
- https://www.vulncheck.com/advisories/netis-nc63-stack-buffer-overflow-via-desthost-parameter
- https://github.com/advisories/GHSA-mx2q-89wp-jrvh