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MEDIUM · 6.8

CVE-2021-35031

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 v...

Vulnerability Description

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.

CVSS Score

6.8

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
ZyxelGs1900-8 Firmware< 2.70\(aahh.0\)-20211208
ZyxelGs1900-8-
ZyxelGs1900-8Hp Firmware< 2.70\(aahi.0\)-20211208
ZyxelGs1900-8Hp-
ZyxelGs1900-10Hp Firmware< 2.70\(aazi.0\)-20211208
ZyxelGs1900-10Hp-
ZyxelGs1900-16 Firmware< 2.70\(aahj.0\)-20211208
ZyxelGs1900-16-
ZyxelGs1900-24E Firmware< 2.70\(aahk.0\)-20211208
ZyxelGs1900-24E-
ZyxelGs1900-24Ep Firmware< 2.70\(abto.0\)-20211208
ZyxelGs1900-24Ep-
ZyxelGs1900-24 Firmware< 2.70\(aahl.0\)-20211208
ZyxelGs1900-24-
ZyxelGs1900-24Hp Firmware< 2.70\(aahm.0\)-20211208
ZyxelGs1900-24Hp-
ZyxelGs1900-24Hpv2 Firmware< 2.70\(aatp.0\)-20211208
ZyxelGs1900-24Hpv2-
ZyxelGs1900-48 Firmware< 2.70\(aahn.0\)-20211208
ZyxelGs1900-48-

Related Weaknesses (CWE)

CWE-78

References

FAQ

What is CVE-2021-35031?

CVE-2021-35031 is a vulnerability with a CVSS score of 6.8 (MEDIUM). 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 v...

How severe is CVE-2021-35031?

CVE-2021-35031 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-35031?

Check the references section above for vendor advisories and patch information. Affected products include: Zyxel Gs1900-8 Firmware, Zyxel Gs1900-8, Zyxel Gs1900-8Hp Firmware, Zyxel Gs1900-8Hp, Zyxel Gs1900-10Hp Firmware.