CVE-2026-6837
Received Received - Intake

Post-Authentication Command Injection in Zyxel WAX650S Firmware

Publication date: 2026-08-04

Last updated on: 2026-08-04

Assigner: Zyxel Corporation

Description
A post-authentication command injection vulnerability in the "export-cgi" CGI program in Zyxel WAX650S firmware versions through 7.10(ABRM.4)C0 could allow an authenticated attacker with administrator privileges to execute OS commands on an affected device.

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Meta Information

Published
2026-08-04
Last Modified
2026-08-04
Generated
2026-08-04
AI Q&A
2026-08-04
EPSS Evaluated
N/A
NVD
CVE-2026-6837
EUVD
EUVD-2026-52566

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
zyxel wax650s to 7.10(abrm.4)c0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

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Executive Summary

This is a post-authentication command injection vulnerability in the export-cgi CGI program of Zyxel WAX650S firmware versions up to 7.10(ABRM.4)C0. An authenticated attacker with admin privileges can exploit it to execute arbitrary OS commands on the affected device.

Impact Analysis

An attacker could gain full control over the affected Zyxel WAX650S device, allowing them to manipulate its operations, steal data, or use it as a pivot point for further network attacks.

Mitigation Strategies

Update the Zyxel WAX650S firmware to the latest version that patches this vulnerability. Ensure only trusted administrators have access to the device. Monitor network traffic for unusual command execution patterns.

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