CriticalCVECISA — Known Exploited Vulnerabilities· 5 Jun 2023

CVE-2023-33009 — Zyxel Multiple Firewalls Buffer Overflow Vulnerability

Severity: Critical · Kind: Vulnerability

Plain-English summary on the way

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From the source

Zyxel Multiple Firewalls. Zyxel ATP, USG FLEX, USG FLEX 50(W), USG20(W)-VPN, VPN, and ZyWALL/USG firewalls contain a buffer overflow vulnerability in the notification function that could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and remote code execution on an affected device. Required action: Apply updates per vendor instructions.

Vulnerability facts

CVE: CVE-2023-33009
On CISA KEV since: 2023-06-05
Ransomware use: Unknown

Read the original advisory →← All threat intel

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Plain-English summaries are AI-generated and reviewed for tone, not technical accuracy. For incident response, always rely on the original source linked above.