Zyxel WRE6505 v2 1.00(ABDV.3)C0 HTTP os command injection

Summaryinfo

A vulnerability categorized as critical has been discovered in Zyxel WRE6505 v2 1.00(ABDV.3)C0. The impacted element is an unknown function of the component HTTP Handler. Such manipulation leads to os command injection. This vulnerability only affects products that are no longer supported by the maintainer. This vulnerability is referenced as CVE-2026-7256. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Zyxel WRE6505 v2 1.00(ABDV.3)C0 and classified as critical. Affected by this issue is an unknown functionality of the component HTTP Handler. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

** UNSUPPORTED WHEN ASSIGNED ** A command injection vulnerability in the CGI program of Zyxel WRE6505 v2 firmware version V1.00(ABDV.3)C0 could allow an adjacent attacker on the LAN to execute operating system (OS) commands on a vulnerable device by sending a crafted HTTP request.

The advisory is available at zyxel.com. This vulnerability is handled as CVE-2026-7256 since 04/28/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 05/12/2026). This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-29376). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• Zyxel

Name

• WRE6505 v2

Version

• 1.00(ABDV.3)C0

License

• commercial

Support

• end of life

Website

• Vendor: https://www.zyxel.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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