A vulnerability in specific versions of Zyxel NBG6818, NBG7815, WSQ20, WSQ50, WSQ60, and WSR30 firmware with pre-configured password management could allow an attacker to obtain root access of the device, if the local attacker dismantles the device and uses a USB-to-UART cable to connect the device, or if the remote assistance feature had been enabled by an authenticated user.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.8, requiring local system access to exploit with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 12 products from zyxel, from zyxel, from zyxel and 9 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2021, 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.
2021-11-23T22:15:07.623
2024-11-21T06:11:42.923
Modified
CVSSv3.1: 7.8 (HIGH)
AV:L/AC:M/Au:N/C:C/I:C/A:C
3.4
10.0
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | zyxel | nbg6818_firmware | < 1.00\(absc.5\)c0 | Yes |
| Hardware | zyxel | nbg6818 | - | No |
| Operating System | zyxel | nbg7815_firmware | < 1.00\(absk.7\)c0 | Yes |
| Hardware | zyxel | nbg7815 | - | No |
| Operating System | zyxel | wsq20_firmware | < 1.00\(abof.11\)c0 | Yes |
| Hardware | zyxel | wsq20 | - | No |
| Operating System | zyxel | wsq50_firmware | < 2.20\(abkj.7\)c0 | Yes |
| Hardware | zyxel | wsq50 | - | No |
| Operating System | zyxel | wsq60_firmware | < 2.20\(abnd.8\)c0 | Yes |
| Hardware | zyxel | wsq60 | - | No |
| Operating System | zyxel | wsr30_firmware | < 1.00\(abmy.12\)c0 | Yes |
| Hardware | zyxel | wsr30 | - | 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.