Executive Summary

This vulnerability is an improper encoding or escaping issue in the CGI program of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0. It allows an adjacent attacker on the WLAN to cause a denial-of-service (DoS) condition in the web management interface. The attacker does this by convincing an authenticated administrator to visit the “AP Select” page while a malformed SSID is present.

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Compliance Impact

The provided information does not include any details on how this vulnerability impacts compliance with common standards and regulations such as GDPR or HIPAA.

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Impact Analysis

The impact of this vulnerability is a denial-of-service (DoS) condition on the web management interface of the affected Zyxel device. This means that an attacker on the same WLAN can disrupt the administrator's ability to manage the device by causing the interface to become unavailable or unresponsive when the administrator visits the “AP Select” page with a malformed SSID present.

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Mitigation Strategies

The vulnerability affects Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0 and allows an adjacent attacker on the WLAN to cause a denial-of-service condition by exploiting the web management interface.

Since no specific mitigation steps or patches are mentioned in the provided resources, the best immediate action is to avoid having authenticated administrators visit the “AP Select” page while a malformed SSID is present on the WLAN.

Additionally, consider restricting WLAN access to trusted users only and monitor for unusual SSID broadcasts that could be malformed.

Long term, consult Zyxel's product lifecycle and support information to plan migration to newer supported products to maintain security and performance.

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