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CVE-2021-4039

CriticalPublished

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.

Published: Mar 1, 2022
Updated: Aug 3, 2024
Assigning CNA: Zyxel
Evidence observed: Apr 19, 2022

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

71.0%

High · next 30 days

Percentile: 99.4%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

Zyxel NWA-1100-NH - Command InjectionExploit
Ahmed Alroky · hardware · Apr 19, 2022

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