CVE-2023-33010
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
A buffer overflow vulnerability in the ID processing function in Zyxel ATP series firmware versions 4.32 through 5.36 Patch 1, USG FLEX series firmware versions 4.50 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.25 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.25 through 5.36 Patch 1, VPN series firmware versions 4.30 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.25 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.
| CWE | CWE-120 |
| Vendor | zyxel |
| Product | atp series firmware |
| Published | May 24, 2023 |
| Last Updated | Oct 21, 2025 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Zyxel / ATP series firmware
4.32 through 5.36 Patch 1
Zyxel / USG FLEX series firmware
4.50 through 5.36 Patch 1
Zyxel / USG FLEX 50(W) firmware
4.25 through 5.36 Patch 1
Zyxel / USG20(W)-VPN firmware
4.25 through 5.36 Patch 1
Zyxel / VPN series firmware
4.30 through 5.36 Patch 1
Zyxel / ZyWALL/USG series firmware
4.25 through 4.73 Patch 1