CVE-2022-0342
Zyxel · published 2022-03-28
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by Zyxel Corporation via the CVE Program.
An authentication bypass vulnerability in the CGI program of Zyxel USG/ZyWALL series firmware versions 4.20 through 4.70, USG FLEX series firmware versions 4.50 through 5.20, ATP series firmware versions 4.32 through 5.20, VPN series firmware versions 4.30 through 5.20, and NSG series firmware versions V1.20 through V1.33 Patch 4, which could allow an attacker to bypass the web authentication and obtain administrative access of the device.
Status at the source
- NVD status: Modified
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Zyxel | USG/ZyWALL series firmware | 4.20 through 4.70: affected |
| Zyxel | USG FLEX series firmware | 4.50 through 5.20: affected |
| Zyxel | ATP series firmware | 4.32 through 5.20: affected |
| Zyxel | VPN series firmware | 4.30 through 5.20: affected |
| Zyxel | NSG series firmware | 1.20 through 1.33 Patch 4: affected |
Products named in NVD's CPE match criteria (23)
cpe:2.3:o:zyxel:usg40_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg40w_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg60_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg60w_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_110_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_310_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:zywall_1100_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg_flex_100_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg_flex_200_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg_flex_500_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg_flex_100w_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:usg_flex_700_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:atp100w_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:atp700_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:vpn50_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:vpn100_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:vpn300_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:vpn1000_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:zyxel:nsg300_firmware:*:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 3.1: 9.8 CRITICAL — as published by Zyxel Corporation (Secondary)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.1: 9.8 CRITICAL — as published by NIST (Primary)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0: 7.5 HIGH — as published by NIST (Primary)
AV:N/AC:L/Au:N/C:P/I:P/A:P
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- https://www.zyxel.com/support/Zyxel-security-advisory-for-authentication-bypass-vulnerability-of-firewalls.shtml
- https://www.zyxel.com/support/Zyxel-security-advisory-for-authentication-bypass-vulnerability-of-firewalls.shtml
Source dates: published 2022-03-28, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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