ZyXEL ZyWALL/USG series devices have a Bleichenbacher vulnerability in their Internet Key Exchange (IKE) handshake implementation used for IPsec based VPN connections.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.9, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts integrity (unauthorized modifications), for affected systems. Impacting 34 products from zyxel, from zyxel, from zyxel and 31 others, organizations running these solutions should prioritize assessment and patching.
First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2018-08-15T18:29:01.230
2024-11-21T04:15:01.633
Modified
CVSSv3.0: 5.9 (MEDIUM)
AV:N/AC:M/Au:N/C:N/I:P/A:N
8.6
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | zyxel | zywall_110_firmware | - | Yes |
| Hardware | zyxel | zywall_110 | - | No |
| Operating System | zyxel | zywall_1100_firmware | - | Yes |
| Hardware | zyxel | zywall_1100 | - | No |
| Operating System | zyxel | zywall_310_firmware | - | Yes |
| Hardware | zyxel | zywall_310 | - | No |
| Operating System | zyxel | zywall_vpn_50_firmware | - | Yes |
| Hardware | zyxel | zywall_vpn_50 | - | No |
| Operating System | zyxel | zywall_vpn_100_firmware | - | Yes |
| Hardware | zyxel | zywall_vpn_100 | - | No |
| Operating System | zyxel | zywall_vpn_300_firmware | - | Yes |
| Hardware | zyxel | zywall_vpn_300 | - | No |
| Operating System | zyxel | usg_20w_firmware | - | Yes |
| Hardware | zyxel | usg_20w | - | No |
| Operating System | zyxel | usg_40_firmware | - | Yes |
| Hardware | zyxel | usg_40 | - | No |
| Operating System | zyxel | usg_40w_firmware | - | Yes |
| Hardware | zyxel | usg_40w | - | No |
| Operating System | zyxel | usg_60_firmware | - | Yes |
| Hardware | zyxel | usg_60 | - | No |
| Operating System | zyxel | usg_60w_firmware | - | Yes |
| Hardware | zyxel | usg_60w | - | No |
| Operating System | zyxel | usg_110_firmware | - | Yes |
| Hardware | zyxel | usg_110 | - | No |
| Operating System | zyxel | usg_2200-vpn_firmware | - | Yes |
| Hardware | zyxel | usg_2200-vpn | - | No |
| Operating System | zyxel | usg_310_firmware | - | Yes |
| Hardware | zyxel | usg_310 | - | No |
| Operating System | zyxel | usg_1100_firmware | - | Yes |
| Hardware | zyxel | usg_1100 | - | No |
| Operating System | zyxel | usg_1900_firmware | - | Yes |
| Hardware | zyxel | usg_1900 | - | No |
| Operating System | zyxel | usg_20w-vpn_firmware | - | 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.