CVE-2021-4029
HIGH
8.8
CVSS Score
Published: February 22, 2022 at 02:25 PM UTC
Updated: June 17, 2026 at 04:18 AM UTC
4 products affected across 1 vendorNBG6817 FirmwareNBG6816 FirmwareARMOR Z2 (NBG6817)
Using ARMOR Z2 (NBG6817) firmware by Zyxel?
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Severity
HIGH8.8
Exploit prediction
EPSS 0.7%
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
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 1.00(abcs.11)c0
Affected range stops below 1.00(abcs.11)c0, so it looks safe — our inference, not a vendor statement
zyxel-nbg6817 (same device)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtmlCVSS
8.8HIGHZyxel
- Attack Vector
- ADJACENT_NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-78
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