An improper privilege management vulnerability in the recovery function of the Zyxel USG FLEX H series uOS firmware version V1.31 and earlier could allow an authenticated local attacker with administrator privileges to upload a crafted configuration file and escalate privileges on a vulnerable device.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.7, requiring local system access to exploit with relatively low complexity without requiring user interaction . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 9 products from zyxel, from zyxel, from zyxel and 6 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2025, 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.
2025-04-22T03:15:21.337
2025-10-30T17:56:11.717
Analyzed
CVSSv3.1: 6.7 (MEDIUM)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | zyxel | uos | 1.31 | Yes |
| Hardware | zyxel | usg_flex_100h | - | No |
| Hardware | zyxel | usg_flex_100hp | - | No |
| Hardware | zyxel | usg_flex_200h | - | No |
| Hardware | zyxel | usg_flex_200hp | - | No |
| Hardware | zyxel | usg_flex_500h | - | No |
| Hardware | zyxel | usg_flex_50h | - | No |
| Hardware | zyxel | usg_flex_50hp | - | No |
| Hardware | zyxel | usg_flex_700h | - | 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.