What is the vulnerability ID of this vulnerability?

The vulnerability ID of this vulnerability is CVE-2021-35032

What is the severity of CVE-2021-35032?

The severity of CVE-2021-35032 is high (7.8)

Which products are affected by CVE-2021-35032?

The Zyxel GS1900 series firmware version 2.60 is affected by CVE-2021-35032.

How can an attacker exploit CVE-2021-35032?

An authenticated local user can exploit CVE-2021-35032 by executing arbitrary OS commands via a crafted function call.

Is there a fix available for CVE-2021-35032?

Yes, Zyxel has released a firmware update to address the vulnerability. Please refer to the Zyxel security advisory for more information.

Vulnerability/
CVE-2021-35032

high

7.8

CWE

28/12/2021

7/1/2022

CVE-2021-35032: OS Command Injection

First published: Tue Dec 28 2021(Updated: )

A vulnerability in the 'libsal.so' of the Zyxel GS1900 series firmware version 2.60 could allow an authenticated local user to execute arbitrary OS commands via a crafted function call.

Credit: security@zyxel.com.tw

Affected Software	Affected Version	How to fix
Zyxel GS1900-8 firmware	<2.70\(aahh.0\)-20211208
Zyxel GS1900-8
Zyxel Gs1900-8hp Firmware	<2.70\(aahi.0\)-20211208
Zyxel Gs1900-8hp
Zyxel Gs1900-10hp Firmware	<2.70\(aazi.0\)-20211208
Zyxel Gs1900-10hp
Zyxel Gs1900-16 Firmware	<2.70\(aahj.0\)-20211208
Zyxel Gs1900-16
Zyxel Gs1900-24e Firmware	<2.70\(aahk.0\)-20211208
Zyxel GS1900-24E
Zyxel Gs1900-24ep Firmware	<2.70\(abto.0\)-20211208
Zyxel GS1900-24EP
Zyxel Gs1900-24 Firmware	<2.70\(aahl.0\)-20211208
Zyxel GS1900-24
Zyxel Gs1900-24hp Firmware	<2.70\(aahm.0\)-20211208
Zyxel Gs1900-24hp
Zyxel Gs1900-24hpv2 Firmware	<2.70\(aatp.0\)-20211208
Zyxel Gs1900-24hpv2
Zyxel Gs1900-48 Firmware	<2.70\(aahn.0\)-20211208
Zyxel Gs1900-48
Zyxel Gs1900-48hp Firmware	<2.70\(aaho.0\)-20211208
Zyxel Gs1900-48hp
Zyxel Gs1900-48hpv2 Firmware	<2.70\(abtq.0\)-20211208
Zyxel Gs1900-48hpv2

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Reference Links

https://www.zyxel.com/support/Zyxel_security_advisory_for_OS_command_injection_vulnerabilities_of_switches.shtml

Frequently Asked Questions

What is the vulnerability ID of this vulnerability?
The vulnerability ID of this vulnerability is CVE-2021-35032
What is the severity of CVE-2021-35032?
The severity of CVE-2021-35032 is high (7.8)
Which products are affected by CVE-2021-35032?
The Zyxel GS1900 series firmware version 2.60 is affected by CVE-2021-35032.
How can an attacker exploit CVE-2021-35032?
An authenticated local user can exploit CVE-2021-35032 by executing arbitrary OS commands via a crafted function call.
Is there a fix available for CVE-2021-35032?
Yes, Zyxel has released a firmware update to address the vulnerability. Please refer to the Zyxel security advisory for more information.

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