CRITICAL 9.3 NVD
CVE-2026-76071
Netis NC63 firmware through V3.0.0.3327 contains a stack-based buffer overflow vulnerability that allows unauthenticated remote attackers to overwrite saved sta
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
- 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-paramet
This critical severity vulnerability with a CVSS score of 9.3 was published on 2026-08-24 via NVD.
Risk Timeline
CVE Disclosed2026-08-24 · -1 days ago
Remediation Resources
Analysis & PoC
www.netis-systems.com/products/NC63.html
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