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CVE-2023-33010: Zyxel Multiple Firewalls Buffer Overflow Vulnerability
Zyxel Multiple Firewalls · in CISA KEV since 2023-06-05
2023-06-05added to KEV
2023-06-26federal remediation due date
28.81%EPSS exploit probability (30 days) 98.1th percentile
9.8 CRITICALCVSS 3.1
Unknownknown ransomware use
12days from NVD publication to KEV
What it is
Zyxel ATP, USG FLEX, USG FLEX 50(W), USG20(W)-VPN, VPN, and ZyWALL/USG firewalls contain a buffer overflow vulnerability in the ID processing function that could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and remote code execution on an affected device.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-120 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2023-05-24 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2023-33010.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.