Zyxel patches two critical vulnerabilities

Zyxell has released a security advisory for multiple buffer overflow vulnerabilities. Exploitation of these vulnerabilities could allow an unauthenticated attacker to cause denial-of-service DoS conditions and even a remote code execution on the affected Zyxell firewalls. Affected users should...

Zyxel Issues Critical Security Patches for Firewall and VPN Products

Zyxel has released software updates to address two critical security flaws affecting select firewall and VPN products that could be abused by remote attackers to achieve code execution. Both the flaws – CVE-2023-33009 and CVE-2023-33010 – are buffer overflow vulnerabilities and are rated 9.8 out ...

Vulnerabilities fixed in Zyxel firewalls

Zyxel has fixed vulnerabilities in the firmware of firewall series ATP, USG FLEX, VPN and ZyWall/USG. An unauthenticated malicious party could exploit the vulnerabilities to cause a denial-of-service, and possibly also to execute arbitrary execute arbitrary code on the vulnerable system. Zyxel ha...

The vulnerability of the microprogrammed software of Zyxel ATP network devices, such as USG FLEX, USG FLEX50(W), USG20(W)-VPN, VPN, ZyWALL/USG, arises from copying buffers without checking the size of the input data. This allows a malicious actor to execute arbitrary code or cause service failures.

The vulnerability of microprogrammed network devices such as Zyxel ATP, USG FLEX, USG FLEX50W, USG20W-VPN, VPN, ZyWALL/USG lies in the copying of buffers without checking the size of the input data. Exploiting this vulnerability allows a remote attacker to execute arbitrary code or cause service...

CVE-2023-33009

A buffer overflow vulnerability in the notification function in Zyxel ATP series firmware versions 4.60 through 5.36 Patch 1, USG FLEX series firmware versions 4.60 through 5.36 Patch 1, USG FLEX 50W firmware versions 4.60 through 5.36 Patch 1, USG20W-VPN firmware versions 4.60 through 5.36 Patch...

CVE-2023-33009

A buffer overflow vulnerability in the notification function in Zyxel ATP series firmware versions 4.60 through 5.36 Patch 1, USG FLEX series firmware versions 4.60 through 5.36 Patch 1, USG FLEX 50W firmware versions 4.60 through 5.36 Patch 1, USG20W-VPN firmware versions 4.60 through 5.36 Patch...

CVE-2023-33010

A buffer overflow vulnerability in the ID processing function in Zyxel ATP series firmware versions 4.32 through 5.36 Patch 1, USG FLEX series firmware versions 4.50 through 5.36 Patch 1, USG FLEX 50W firmware versions 4.25 through 5.36 Patch 1, USG20W-VPN firmware versions 4.25 through 5.36 Patc...

Buffer overflow

A buffer overflow vulnerability in the notification function in Zyxel ATP series firmware versions 4.60 through 5.36 Patch 1, USG FLEX series firmware versions 4.60 through 5.36 Patch 1, USG FLEX 50W firmware versions 4.60 through 5.36 Patch 1, USG20W-VPN firmware versions 4.60 through 5.36 Patch...

Buffer overflow

A buffer overflow vulnerability in the ID processing function in Zyxel ATP series firmware versions 4.32 through 5.36 Patch 1, USG FLEX series firmware versions 4.50 through 5.36 Patch 1, USG FLEX 50W firmware versions 4.25 through 5.36 Patch 1, USG20W-VPN firmware versions 4.25 through 5.36 Patc...

CVE-2023-33010

A buffer overflow vulnerability in the ID processing function in Zyxel ATP series firmware versions 4.32 through 5.36 Patch 1, USG FLEX series firmware versions 4.50 through 5.36 Patch 1, USG FLEX 50W firmware versions 4.25 through 5.36 Patch 1, USG20W-VPN firmware versions 4.25 through 5.36 Patc...

CVE-2023-33009

A buffer overflow vulnerability in the notification function in Zyxel ATP series firmware versions 4.60 through 5.36 Patch 1, USG FLEX series firmware versions 4.60 through 5.36 Patch 1, USG FLEX 50W firmware versions 4.60 through 5.36 Patch 1, USG20W-VPN firmware versions 4.60 through 5.36 Patch...

CVE-2023-33010

A buffer overflow vulnerability in the ID processing function in Zyxel ATP series firmware versions 4.32 through 5.36 Patch 1, USG FLEX series firmware versions 4.50 through 5.36 Patch 1, USG FLEX 50W firmware versions 4.25 through 5.36 Patch 1, USG20W-VPN firmware versions 4.25 through 5.36 Patc...

PT-2023-2851

Name of the Vulnerable Software and Affected Versions Zyxel ATP series versions 4.32 through 5.36 Patch 1 Zyxel USG FLEX series versions 4.50 through 5.36 Patch 1 Zyxel USG FLEX 50W versions 4.25 through 5.36 Patch 1 Zyxel USG20W-VPN versions 4.25 through 5.36 Patch 1 Zyxel VPN series versions 4....

CVE-2023-33010

CVE-2023-33010 is a high-severity (CVSS 3.1: 9.8) buffer overflow in the ID processing function of Zyxel firewalls (ATP, USG FLEX, USG, ZyWALL/VPN) that can be exploited without authentication to cause DoS and remote code execution. Affected firmware ranges include Zyxel ATP 4.32–5.36 Patch 1, US...

CVE-2023-33009

CVE-2023-33009 is a buffer-overflow vulnerability in the notification function across Zyxel firewall/NGFW families (ATP, USG FLEX, VPN, ZyWALL/USG) with affected firmware ranges roughly 4.60–5.36 Patch 1 (and ZyWALL/USG 4.60–4.73 Patch 1). An unauthenticated attacker could trigger denial-of-servi...

The vulnerability of microprogrammed software in network devices such as Zyxel ZyWALL/USG, VPN, USG FLEX, ATP allows a perpetrator to execute arbitrary commands.

The vulnerability of Zyxel ZyWALL/USG, VPN, USG FLEX, and ATP network devices exists due to the lack of measures taken to neutralize special elements used in the operating system commands. Exploiting this vulnerability allows a malicious actor to execute arbitrary commands remotely...

Zyxel Firewall Devices Vulnerable to Remote Code Execution Attacks — Patch Now

Networking equipment maker Zyxel has released patches for a critical security flaw in its firewall devices that could be exploited to achieve remote code execution on affected systems. The issue, tracked as CVE-2023-28771, is rated 9.8 on the CVSS scoring system. Researchers from TRAPA Security...

CVE-2023-28771

Improper error message handling in Zyxel ZyWALL/USG series firmware versions 4.60 through 4.73, VPN series firmware versions 4.60 through 5.35, USG FLEX series firmware versions 4.60 through 5.35, and ATP series firmware versions 4.60 through 5.35, which could allow an unauthenticated attacker to...

Vulnerabilities fixed in Zyxel Firewalls and Access Points

Zyxel has fixed vulnerabilities in the firmware of several USG, APT, VPN and ZyWall systems. A malicious party can exploit the vulnerabilities exploit them for attacks that can result in the following categories of damage: Cross-Site Scripting XSS Denial-of-Service DoS. Remote code execution...

CVE-2023-28771

CVE-2023-28771 is an OS command injection in Zyxel devices (ZyWALL/USG, VPN, USG FLEX, ATP) due to improper error message handling. A unauthenticated attacker can remotely execute commands by sending crafted UDP/IKE-related packets to affected firmware: Zyxel ATP, USG FLEX, VPN, and ZyWALL/USG li...