🛡️ CVE-2023-33009
🔴 CVSS 9.8 — Critical ✅ No Known Exploit CWE-120 NVD
9.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A buffer overflow vulnerability in the notification function in Zyxel ATP series firmware versions 4.60 through 5.36 Patch 1, USG FLEX series firmware versions 4.60 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.60 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.60 through 5.36 Patch 1, VPN series firmware versions 4.60 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.60 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device.

Details

Severity CRITICAL
CVSS Score 9.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-120
Public Exploit ✅ No
Source NVD
Published 2023-05-24
Updated 2026-06-08
Modified 2026-02-26
Fix URL N/A

Affected Packages

Software From version Fixed in
atp100-firmware
atp100w-firmware
atp200-firmware
atp500-firmware
atp700-firmware
atp800-firmware
usg-20w-vpn-firmware
usg-40-firmware
usg-40w-firmware
usg-60-firmware
usg-60w-firmware
usg-flex-100-firmware
usg-flex-100w-firmware
usg-flex-200-firmware
usg-flex-50-firmware
usg-flex-500-firmware
usg-flex-50w-firmware
usg-flex-700-firmware
usg20-vpn-firmware
vpn100-firmware
vpn1000-firmware
vpn300-firmware
vpn50-firmware

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