CVE:CVE-2019-9955
CNNVD:CNNVD-201904-785
ZyXEL ZyWall 310等都是中国台湾合勤（ZyXEL）公司的产品。ZyXEL ZyWall 310是一款310系列VPN防火墙设备。ZyXEL ZyWall 110是一款110系列VPN防火墙设备。ZyXEL USG1900是一款下一代统一安全网关设备。
多款Zyxel产品中存在跨站脚本漏洞，该漏洞源于WEB应用缺少对客户端数据的正确验证。攻击者可利用该漏洞执行客户端代码。以下产品受到影响：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。
solution:Upgrade zyxel atp200_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel atp500_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel atp800_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel usg20-vpn_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel usg20w-vpn_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel usg40_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel usg40w_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel usg60_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel usg60w_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel usg110_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel usg210_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel usg310_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel usg1100_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel usg1900_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel usg2200-vpn_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel zywall_110_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel zywall_310_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel zywall_1100_firmware to a higher version than 4.31,and avoid the version 4.31; Upgrade zyxel vpn50_firmware to a higher version than -; Upgrade zyxel vpn100_firmware to a higher version than -; Upgrade zyxel vpn300_firmware to a higher version than -