CVE

CVE-2019-9955

6.1

CVSS

Description

On Zyxel ATP200, ATP500, ATP800, USG20-VPN, USG20W-VPN, USG40, USG40W, USG60, USG60W, USG110, USG210, USG310, USG1100, USG1900, USG2200-VPN, ZyWALL 110, ZyWALL 310, ZyWALL 1100 devices, the security firewall login page is vulnerable to Reflected XSS via the unsanitized 'mp_idx' parameter.

Attack Vector

Privileges Req.

User Interaction

Updated Sep 18, 2026View on NVD →

S4E scanner

mediumProduct Based Web Vulnerabilities~15 seconds

CVE-2019-9955 Scanner

Detects 'Cross-Site Scripting (XSS)' vulnerability in Zyxel firmware affects v. 4.31.

Used 3k times · 5.9k assets checked · url

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