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CVE-2021-35030

Quick assessment

Affected
Zyxel GS1900-8 Firmware
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zyxel GS1900-8是中国台湾合勤（Zyxel）公司的一款智能网管交换机，具有千兆速度和基本管理功能，可为用户的业务网络带来更大的灵活性和连接性。 Zyxel GS1900-8 firmware存在跨站脚本漏洞，该漏洞允许经过身份验证的本地用户通过精心制作的LLDP包执行跨站脚本攻击。

CVSS 3.5 · Low EPSS 0.27% · P18
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I. Basic Information for CVE-2021-35030

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in the CGI program in Zyxel GS1900-8 firmware version V2.60, that did not properly sterilize packet contents and could allow an authenticated, local user to perform a cross-site scripting (XSS) attack via a crafted LLDP packet.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Zyxel GS1900-8 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zyxel GS1900-8是中国台湾合勤（Zyxel）公司的一款智能网管交换机，具有千兆速度和基本管理功能，可为用户的业务网络带来更大的灵活性和连接性。 Zyxel GS1900-8 firmware存在跨站脚本漏洞，该漏洞允许经过身份验证的本地用户通过精心制作的LLDP包执行跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Zyxel GS1900-8 Firmware 2.60 -

II. Public POCs for CVE-2021-35030

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III. Intelligence Information for CVE-2021-35030

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Other References for CVE-2021-35030 (1)

IV. Related Vulnerabilities

Same vendor: Zyxel
Same weakness: CWE-79

V. Comments for CVE-2021-35030

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