A buffer overflow vulnerability in the CGI program of Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50(W) series firmware versions from V4.16 through V5.38, and USG20(W)-VPN series firmware versions from V4.16 through V5.38 could allow an authenticated attacker with administrator privileges to cause denial of service (DoS) conditions by sending a crafted HTTP request to a vulnerable device.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 4.9, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 16 products from zyxel, from zyxel, from zyxel and 13 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2024, 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.
2024-09-03T02:15:05.317
2024-12-13T16:14:42.787
Analyzed
CVSSv3.1: 4.9 (MEDIUM)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | zyxel | zld | < 5.39 | Yes |
| Hardware | zyxel | atp100 | - | No |
| Hardware | zyxel | atp100w | - | No |
| Hardware | zyxel | atp200 | - | No |
| Hardware | zyxel | atp500 | - | No |
| Hardware | zyxel | atp700 | - | No |
| Hardware | zyxel | atp800 | - | No |
| Operating System | zyxel | zld | < 5.39 | Yes |
| Hardware | zyxel | usg_flex_100 | - | No |
| Hardware | zyxel | usg_flex_100ax | - | No |
| Hardware | zyxel | usg_flex_100w | - | No |
| Hardware | zyxel | usg_flex_200 | - | No |
| Hardware | zyxel | usg_flex_50 | - | No |
| Hardware | zyxel | usg_flex_500 | - | No |
| Hardware | zyxel | usg_flex_700 | - | No |
| Operating System | zyxel | zld | < 5.39 | Yes |
| Hardware | zyxel | usg_flex_50w | - | No |
| Operating System | zyxel | zld | < 5.39 | Yes |
| Hardware | zyxel | usg_20w-vpn | - | 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.