Published: 28/12/2021 Updated: 07/01/2022

CVSS v2 Base Score: 7.7 | Impact Score: 10 | Exploitability Score: 5.1

CVSS v3 Base Score: 8 | Impact Score: 5.9 | Exploitability Score: 2.1

VMScore: 685

Vector: AV:A/AC:L/Au:S/C:C/I:C/A:C

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A vulnerability in the TFTP client of Zyxel GS1900 series firmware, XGS1210 series firmware, and XGS1250 series firmware, which could allow an authenticated LAN user to execute arbitrary OS commands via the GUI of the vulnerable device.

Vulnerable Product	Search on Vulmon	Subscribe to Product
zyxel gs1900-8_firmware
zyxel gs1900-8hp_firmware
zyxel gs1900-10hp_firmware
zyxel gs1900-16_firmware
zyxel gs1900-24e_firmware
zyxel gs1900-24ep_firmware
zyxel gs1900-24_firmware
zyxel gs1900-24hp_firmware
zyxel gs1900-24hpv2_firmware
zyxel gs1900-48_firmware
zyxel gs1900-48hp_firmware
zyxel gs1900-48hpv2_firmware
zyxel xgs1210-12_firmware
zyxel xgs1250-12_firmware

CWE-78 https://www.zyxel.com/support/Zyxel_security_advisory_for_OS_command_injection_vulnerabilities_of_switches.shtml https://nvd.nist.gov

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CVE-2021-35031

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