CISA Known Exploited Vulnerability

This vulnerability is actively exploited in the wild and listed in the CISA Known Exploited Vulnerabilities catalog.

Remediation Deadline: Jun 21, 2023

High

CISA KEV

CVE-2023-28771

Zyxel—Multiple Firewalls

Zyxel ATP, USG FLEX, VPN, and ZyWALL/USG firewalls allow for improper error message handling which could allow an unauthenticated attacker to execute OS commands remotely by sending crafted packets to an affected device.

Required Action

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-remote-command-injection-vulnerability-of-firewalls; https://nvd.nist.gov/vuln/detail/CVE-2023-28771

Vulnerability Overview

Severity: High
CISA KEV: Yes
Ransomware: Unknown
Published: May 31, 2023
KEV Added: May 31, 2023
Due Date: Jun 21, 2023
Related Articles: 0

Vendor

Zyxel

Multiple Firewalls