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2026-06-16
Zyxel GS1900 Series Switch CGI Stack-based Buffer Overflow Remote Code Execution (RCE) Advisory (CVE-2026-7273)
[Affected Scope] Zyxel GS1900-48HPv2 firmware versions up to 2.90(ABTQ.1)C0.
[Impact] Unauthenticated LAN-based attackers can execute arbitrary OS commands and gain full control of the device via crafted HTTP requests.
[Mitigation] Immediately update to the latest patched firmware and restrict access to the management interface using ACLs.