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High severity8.8NVD Advisory· Published Feb 24, 2022· Updated Jun 17, 2026

CVE-2021-4029

CVE-2021-4029

Description

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.

Affected products

5
  • Zyxel/Nbg6816 Firmware2 versions
    cpe:2.3:o:zyxel:nbg6816_firmware:1.00\(aawb.10\)c0:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:zyxel:nbg6816_firmware:1.00\(aawb.10\)c0:*:*:*:*:*:*:*
    • (no CPE)range: 1.00(AAWB.10)C0
  • Zyxel/Nbg6817 Firmware2 versions
    cpe:2.3:o:zyxel:nbg6817_firmware:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:zyxel:nbg6817_firmware:*:*:*:*:*:*:*:*range: <1.00\(abcs.11\)c0
    • (no CPE)range: 1.00(ABCS.10)C0
  • Zyxel/ARMOR Z1llm-fuzzy

Patches

Vulnerability mechanics

References

1

News mentions

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