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2023-05-24
Zyxel Firewall Notification Function Buffer Overflow Vulnerability (CVE-2023-33009) Analysis and Mitigation Guide
[Affected Scope] Zyxel ATP, USG FLEX, USG FLEX 50(W), USG20(W)-VPN, VPN, and ZyWALL/USG series firmware within specific version ranges.
[Impact] An unauthenticated remote attacker can trigger denial-of-service (DoS) conditions or execute arbitrary code on the affected device.
[Mitigation] Immediately upgrade to the latest patched firmware version provided by the vendor and restrict external access to management interfaces.