A NULL pointer dereference in Draytek devices Vigor 165/166 prior to v4.2.6 , Vigor 2620/LTE200 prior to v3.9.8.8, Vigor 2860/2925 prior to v3.9.7, Vigor 2862/2926 prior to v3.9.9.4, Vigor 2133/2762/2832 prior to v3.9.8, Vigor 2135/2765/2766 prior to v4.4.5.1, Vigor 2865/2866/2927 prior to v4.4.5.3, Vigor 2962/3910 prior to v4.3.2.7, Vigor 3912 prior to v4.3.5.2, and Vigor 2925 up to v3.9.6 allows attackers to cause a Denial of Service (DoS) via a crafted DHCP request.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.5, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 40 products from draytek, from draytek, from draytek and 37 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.
2025-02-27T21:15:36.753
2025-06-03T14:06:40.670
Analyzed
CVSSv3.1: 7.5 (HIGH)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | draytek | vigor165_firmware | < 4.2.6 | Yes |
| Hardware | draytek | vigor165 | - | No |
| Operating System | draytek | vigor166_firmware | < 4.2.6 | Yes |
| Hardware | draytek | vigor166 | - | No |
| Operating System | draytek | vigor2620_firmware | < 3.9.8.8 | Yes |
| Hardware | draytek | vigor2620 | - | No |
| Operating System | draytek | vigorlte200_firmware | < 3.9.8.8 | Yes |
| Hardware | draytek | vigorlte200 | - | No |
| Operating System | draytek | vigor2860_firmware | < 3.9.7 | Yes |
| Hardware | draytek | vigor2860 | - | No |
| Operating System | draytek | vigor2925_firmware | < 3.9.7 | Yes |
| Hardware | draytek | vigor2925 | - | No |
| Operating System | draytek | vigor2862_firmware | < 3.9.9.4 | Yes |
| Hardware | draytek | vigor2862 | - | No |
| Operating System | draytek | vigor2926_firmware | < 3.9.9.4 | Yes |
| Hardware | draytek | vigor2926 | - | No |
| Operating System | draytek | vigor2133_firmware | < 3.9.8 | Yes |
| Hardware | draytek | vigor2133 | - | No |
| Operating System | draytek | vigor2762_firmware | < 3.9.8 | Yes |
| Hardware | draytek | vigor2762 | - | No |
| Operating System | draytek | vigor2832_firmware | < 3.9.8 | Yes |
| Hardware | draytek | vigor2832 | - | No |
| Operating System | draytek | vigor2135_firmware | < 4.4.5.1 | Yes |
| Hardware | draytek | vigor2135 | - | No |
| Operating System | draytek | vigor2765_firmware | < 4.4.5.1 | Yes |
| Hardware | draytek | vigor2765 | - | No |
| Operating System | draytek | vigor2766_firmware | < 4.4.5.1 | Yes |
| Hardware | draytek | vigor2766 | - | No |
| Operating System | draytek | vigor2865_firmware | < 4.4.5.3 | Yes |
| Hardware | draytek | vigor2865 | - | No |
| Operating System | draytek | vigor2866_firmware | < 4.4.5.3 | Yes |
| Hardware | draytek | vigor2866 | - | No |
| Operating System | draytek | vigor2927_firmware | < 4.4.5.3 | Yes |
| Hardware | draytek | vigor2927 | - | No |
| Operating System | draytek | vigor2962_firmware | < 4.3.2.7 | Yes |
| Hardware | draytek | vigor2962 | - | No |
| Operating System | draytek | vigor3910_firmware | < 4.3.2.7 | Yes |
| Hardware | draytek | vigor3910 | - | No |
| Operating System | draytek | vigor3912_firmware | < 4.3.5.2 | Yes |
| Hardware | draytek | vigor3912 | - | 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 draytek'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.