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CVE PROGRAM SOURCE RECORD9.3 Critical

CVE-2026-76070

Netis NC63 V3.0.0.3327 Stack Buffer Overflow via Login Password Parameter

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 submitting an oversized Base64-encoded password to the login handler in /bin/netis.cgi. Attackers can exploit the custom Base64 decoder's lack of output length validation against the fixed-size stack buffer to achieve remote code execution with root privileges, as the Boa web server executes the CGI environment as root.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Netis Systems NC63

Default version status: affected

  • 0 to ≤ 3.0.0.3327affected

References