Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability
Zyxel · GS1900 Series Switches
Date added (CISA)
2026-09-21
Remediation due
2026-09-24
Known ransomware use
Not indicated
Remediation priority
P2 — past CISA due date
Description
Zyxel GS1900 series switches contain a stack-based buffer overflow vulnerability in the CGI program which could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.