CWE
79
Advisory Published
Updated

CVE-2021-35030: XSS

First published: Mon Jul 26 2021(Updated: )

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.

Credit: security@zyxel.com.tw

Affected SoftwareAffected VersionHow to fix
Zyxel GS1900-8 firmware<2.70
Zyxel GS1900-8
Zyxel Gs1900-8hp Firmware<2.70
Zyxel Gs1900-8hp
Zyxel GS1900-10HP firmware<2.70
Zyxel GS1900-10HP
Zyxel Gs1900-16 Firmware<2.70
Zyxel Gs1900-16
Zyxel Gs1900-24e Firmware<2.70
Zyxel GS1900-24E
Zyxel Gs1900-24ep Firmware<2.70
Zyxel GS1900-24EP
Zyxel Gs1900-24 Firmware<2.70
Zyxel GS1900-24
Zyxel Gs1900-24hp Firmware<2.70
Zyxel Gs1900-24hp
Zyxel Gs1900-24hpv2 Firmware<2.70
Zyxel Gs1900-24hpv2
Zyxel Gs1900-48 Firmware<2.70
Zyxel GS1900-48
Zyxel Gs1900-48hp Firmware<2.70
Zyxel Gs1900-48hp
Zyxel Gs1900-48hpv2 Firmware<2.70
Zyxel Gs1900-48hpv2

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Frequently Asked Questions

  • What is the vulnerability ID for this vulnerability?

    The vulnerability ID for this vulnerability is CVE-2021-35030.

  • What is the severity level of CVE-2021-35030?

    The severity level of CVE-2021-35030 is medium (4.3).

  • Which software is affected by CVE-2021-35030?

    The Zyxel GS1900-8 firmware versions up to and excluding V2.70 are affected by CVE-2021-35030.

  • What is the impact of CVE-2021-35030?

    CVE-2021-35030 could allow an authenticated, local user to perform a cross-site scripting (XSS) attack via a crafted LLDP packet.

  • Where can I find more information about CVE-2021-35030?

    You can find more information about CVE-2021-35030 at the Zyxel security advisory page: https://www.zyxel.com/support/Zyxel_security_advisory_for_XSS_vulnerability_of_GS1900_series_switches.shtml

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