CVE-2026-13206

Deferred Deferred - Pending Action

OS Command Injection in Zyxel Networks WAH7601

Publication date: 2026-08-10

Last updated on: 2026-08-26

Assigner: Computer Emergency Response Team of the Republic of Turkey

Description

Improper neutralization of special elements used in an OS command ('OS command injection') vulnerability in Zyxel Networks WAH7601 allows OS Command Injection. This issue affects WAH7601: through 20072026.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-10

Last Modified

2026-08-26

Generated

2026-08-30

AI Q&A

2026-08-10

EPSS Evaluated

2026-08-29

NVD

CVE-2026-13206

EUVD

EUVD-2026-55621

Affected Vendors & Products

Vendor	Product	Version / Range
zyxel	wah7601	to 20072026 (exc)

Helpful Resources

Exploitability

CWE

KEV

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

Executive Summary

This is an OS command injection vulnerability in Zyxel Networks WAH7601 devices. It allows attackers to execute arbitrary commands on the system by injecting special characters into inputs that are not properly neutralized.

Detection Guidance

Detecting OS command injection vulnerabilities like CVE-2026-13206 requires checking for improper input handling in Zyxel WAH7601 devices. Inspect network traffic for unusual command execution patterns or payloads targeting the device. Use tools like Wireshark to analyze HTTP requests for suspicious inputs such as semicolons, pipes, or command chaining. Verify if the device firmware is outdated by checking the version against the latest release from Zyxel.

Impact Analysis

An attacker could gain full control of the affected device, leading to potential data theft, unauthorized access, or disruption of services. This could affect network security and privacy.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR and HIPAA requirements for data protection and security. Organizations may face legal penalties and reputational damage.

Mitigation Strategies

Immediately update the Zyxel WAH7601 firmware to the latest version to patch the OS command injection vulnerability. If an update is not available, isolate the device from the network to prevent exploitation.

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