RCE in Zyxel Nwa1100-nh
CVE-2021-4039
A command injection vulnerability in the web interface of the Zyxel NWA-1100-NH firmware could allow an attacker to execute arbitrary OS commands on the device.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.710 (99.3th 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 Nwa1100-nh
- Zyxel Nwa1100-nh Firmware — versions 2.12(AASI.0)C0
- Zyxel Nwa1100-nh_firmware
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@zyxel.com.tw (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security@zyxel.com.tw (Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2021-4039?
- CVE-2021-4039 is a critical-severity vulnerability in Zyxel Nwa1100-nh, classified under OS Command Injection. CVSS score: 9.8/10. Published 2022-03-01.
- How severe is CVE-2021-4039?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-4039 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.