What is the CVSS score of CVE-2021-35028?

CVE-2021-35028 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.3%.

Is there a patch available for CVE-2021-35028?

Yes, a patch is available for CVE-2021-35028. Update the affected software to the latest version immediately.

Zywall Vpn2S Firmware CVE-2021-35028

HIGH

OS Command Injection (CWE-78)

2021-09-29 security@zyxel.com.tw

Zyxel Command Injection Zywall Vpn2S Firmware

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Sep 29, 2021 - 11:15 nvd

HIGH 7.8

DescriptionNVD

A command injection vulnerability in the CGI program of the Zyxel VPN2S firmware version 1.12 could allow an authenticated, local user to execute arbitrary OS commands.

AnalysisAI

A command injection vulnerability in the CGI program of the Zyxel VPN2S firmware version 1.12 could allow an authenticated, local user to execute arbitrary OS commands. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. This OS Command Injection vulnerability could allow attackers to execute arbitrary operating system commands on the host.

Technical ContextAI

This vulnerability is classified as OS Command Injection (CWE-78), which allows attackers to execute arbitrary operating system commands on the host. A command injection vulnerability in the CGI program of the Zyxel VPN2S firmware version 1.12 could allow an authenticated, local user to execute arbitrary OS commands. Affected products include: Zyxel Zywall Vpn2S Firmware. Version information: version 1.12.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Avoid passing user input to shell commands. Use language-specific APIs instead of shell execution. Apply strict input validation with allowlists.