RCE in Zyxel Atp Series Firmware
CVE-2023-27991
The post-authentication command injection vulnerability in the CLI command of Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.16 through 5.35, US…
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.023 (85.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Zyxel Atp Series Firmware — versions 4.32 through 5.35
- Zyxel Usg20(w)-vpn Firmware — versions 4.16 through 5.35
- Zyxel Usg Flex 50(w) Firmware — versions 4.16 through 5.35
- Zyxel Usg Flex Series Firmware — versions 4.50 through 5.35
- Zyxel Vpn Series Firmware — versions 4.30 through 5.35
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2023-27991?
- CVE-2023-27991 is a high-severity vulnerability in Zyxel Atp Series Firmware, classified under OS Command Injection. CVSS score: 8.8/10. Published 2023-04-24.
- How severe is CVE-2023-27991?
- High severity. CVSS v3 base score is 8.8 out of 10.