Auth bypass in Zyxel Atp Series Firmware
CVE-2022-0342
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 firmw…
Vulnerability class: Broken Authentication
EPSS: 0.924 (99.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Zyxel Atp Series Firmware — versions 4.32 through 5.20
- Zyxel Nsg Series Firmware — versions 1.20 through 1.33 Patch 4
- Zyxel Usg Flex Series Firmware — versions 4.50 through 5.20
- Zyxel Usg/zywall Series Firmware — versions 4.20 through 4.70
- Zyxel Vpn Series Firmware — versions 4.30 through 5.20
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.zyxel.com/support/Zyxel-security-advisory-for-authentication-bypass-vulnera… (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2022-0342?
- CVE-2022-0342 is a critical-severity vulnerability in Zyxel Atp Series Firmware, classified under Improper Authentication. CVSS score: 9.8/10. Published 2022-03-28.
- How severe is CVE-2022-0342?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2022-0342 known to be exploited?
- 10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.