RCE in Zyxel Armor Z1 (Nbg6816) Firmware
CVE-2021-4029
A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary OS commands via a LAN interface.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (53.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Zyxel Armor Z1 (Nbg6816) Firmware — versions 1.00(AAWB.10)C0
- Zyxel Armor Z2 (Nbg6817) Firmware — versions 1.00(ABCS.10)C0
- Zyxel Nbg6816
- Zyxel Nbg6816 Firmware — versions 1.00\(aawb.10\)c0, 1.00(aawb.10)c0
- Zyxel Nbg6817
- Zyxel Nbg6817 Firmware
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2021-4029?
- CVE-2021-4029 is a high-severity vulnerability in Zyxel Armor Z1 (Nbg6816) Firmware, classified under OS Command Injection. CVSS score: 8.8/10. Published 2022-02-24.
- How severe is CVE-2021-4029?
- High severity. CVSS v3 base score is 8.8 out of 10.