CSRF in Zyxel Armor Z1 (Nbg6816) Firmware
CVE-2021-4030
A cross-site request forgery vulnerability in the HTTP daemon of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary commands if they coerce or trick a local user to visit a compromised website with malicious scripts.
Vulnerability class: CSRF (Cross-Site Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (35.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · 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-2021-4030?
- CVE-2021-4030 is a high-severity vulnerability in Zyxel Armor Z1 (Nbg6816) Firmware, classified under Cross-Site Request Forgery (CSRF). CVSS score: 8.0/10. Published 2022-02-24.
- How severe is CVE-2021-4030?
- High severity. CVSS v3 base score is 8.0 out of 10.