CVE-2026-6058
Improper Encoding in Zyxel WRE6505 CGI Causes DoS
Publication date: 2026-04-21
Last updated on: 2026-04-21
Assigner: Zyxel Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| zyxel | wre6505 | v1.00(abdv.3)c0 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-116 | The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved. |
Attack-Flow Graph
AI Powered Q&A
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
The provided information does not include any details on how this vulnerability impacts compliance with common standards and regulations such as GDPR or HIPAA.
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
What immediate steps should I take to mitigate this vulnerability?
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.