#VU60817 Cross-site scripting in NBG6816 (Armor Z1) and NBG6817 (Armor Z2)


Published: 2022-02-23

Vulnerability identifier: #VU60817

Vulnerability risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-4030

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
NBG6816 (Armor Z1)
Hardware solutions / Firmware
NBG6817 (Armor Z2)
Hardware solutions / Firmware

Vendor: ZyXEL Communications Corp.

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in the HTTP daemon. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

NBG6816 (Armor Z1): All versions


External links
http://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtml


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


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