CVE WatchAug 24, 2026

CVE-2026-76070

Netis NC63 firmware through V3.0.0.3327 contains a stack-based buffer overflow vulnerability that allows unauthenticated remote attackers to

CVSS

9.8

Critical

EPSS

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KEV

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Exploit Today

0-100

Published: Aug 24, 2026 · Last modified: Aug 24, 2026 · CWE-121

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

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