The configuration parser of Zyxel ATP series firmware versions 5.10 through 5.35, USG FLEX series firmware versions 5.00 through 5.35, USG FLEX 50(W) firmware versions 5.10 through 5.35, USG20(W)-VPN firmware versions 5.10 through 5.35, and VPN series firmware versions 5.00 through 5.35, which fails to properly sanitize user input. A remote unauthenticated attacker could leverage the vulnerability to modify device configuration data, resulting in DoS conditions on an affected device if the attacker could trick an authorized administrator to switch the management mode to the cloud mode.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.1, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 36 products from zyxel, from zyxel, from zyxel and 33 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2023, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2023-04-24T17:15:09.767
2024-11-21T07:45:38.620
Modified
CVSSv3.1: 8.1 (HIGH)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | zyxel | usg_flex_100_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | usg_flex_100 | - | No |
| Operating System | zyxel | usg_flex_100w_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | usg_flex_100w | - | No |
| Operating System | zyxel | usg_flex_200_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | usg_flex_200 | - | No |
| Operating System | zyxel | usg_flex_50_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | usg_flex_50 | - | No |
| Operating System | zyxel | usg_flex_50w_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | usg_flex_50w | - | No |
| Operating System | zyxel | usg_flex_500_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | usg_flex_500 | - | No |
| Operating System | zyxel | usg_flex_700_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | usg_flex_700 | - | No |
| Operating System | zyxel | vpn100_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | vpn100 | - | No |
| Operating System | zyxel | vpn1000_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | vpn1000 | - | No |
| Operating System | zyxel | vpn300_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | vpn300 | - | No |
| Operating System | zyxel | vpn50_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | vpn50 | - | No |
| Operating System | zyxel | usg_20w-vpn_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | usg_20w-vpn | - | No |
| Operating System | zyxel | atp100_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | atp100 | - | No |
| Operating System | zyxel | atp100w_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | atp100w | - | No |
| Operating System | zyxel | atp200_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | atp200 | - | No |
| Operating System | zyxel | atp500_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | atp500 | - | No |
| Operating System | zyxel | atp700_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | atp700 | - | No |
| Operating System | zyxel | atp800_firmware | ≤ 5.35 | Yes |
| Hardware | zyxel | atp800 | - | No |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For zyxel's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.