Upcoming Speaking Engagements

This is a current list of where and when I am scheduled to speak: Im giving a webinar via Zoom on Wednesday, May 22, at 11:00 AM ET. The topic is "Should the USG Establish a Publicly Funded AI Option?" The list is maintained on this page...

The vulnerability of the File Transfer Protocol (FTP) implementation in the microprogrammed networking devices of ZyXEL USG FLEX, USG FLEX 50(W)/USG20(W)-VPN, USG FLEX H, and ATP allows a perpetrator to execute arbitrary commands.

The vulnerability of the File Transfer Protocol FTP implementation in microprogrammed network devices such as ZyXEL USG FLEX, USG FLEX 50W/USG20W-VPN, USG FLEX H, and ATP lies in the lack of measures to neutralize special elements used in operating system commands during the loading of binary...

PT-2024-1935 · Zyxel · Zyxel Usg +1

Name of the Vulnerable Software and Affected Versions: Zyxel USG and Zyxel VPN affected versions not specified Description: The issue is related to a buffer overflow in the memory of the SMB service in the firmware of Zyxel USG and Zyxel VPN firewalls and VPN devices. This can be exploited by a...

Exploit for OS Command Injection in Zyxel Usg_Flex_100W_Firmware

CVE-2022-30525 Zyxel Firewall Remote Command Injection A py...

CVE-2023-6764

A format string vulnerability in a function of the IPSec VPN feature in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50W series firmware versions from 4.16 through 5.37 Patch 1, and USG20W-VPN series...

CVE-2023-6764

A format string vulnerability in a function of the IPSec VPN feature in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50W series firmware versions from 4.16 through 5.37 Patch 1, and USG20W-VPN series...

Format string

A format string vulnerability in a function of the IPSec VPN feature in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50W series firmware versions from 4.16 through 5.37 Patch 1, and USG20W-VPN series...

CVE-2023-6398

A post-authentication command injection vulnerability in the file upload binary in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50W series firmware versions from 4.16 through 5.37 Patch 1, USG20W-VPN...

CVE-2023-6399

A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50W series firmware versions from 4.16 through 5.37 Patch 1, USG20W-VPN series firmware versions from 4.16 through 5.37...

CVE-2023-6397

A null pointer dereference vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1 and USG FLEX series firmware versions from 4.50 through 5.37 Patch 1 could allow a LAN-based attacker to cause denial-of-service DoS conditions by downloading a crafted RAR compressed fil...

Format string

A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50W series firmware versions from 4.16 through 5.37 Patch 1, USG20W-VPN series firmware versions from 4.16 through 5.37...

Null pointer dereference

A null pointer dereference vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1 and USG FLEX series firmware versions from 4.50 through 5.37 Patch 1 could allow a LAN-based attacker to cause denial-of-service DoS conditions by downloading a crafted RAR compressed fil...

CVE-2023-6764

CVE-2023-6764 is a format-string vulnerability in Zyxel devices’ IPSec VPN functionality. Affected products and versions include Zyxel ATP series firmware 4.32–5.37 Patch 1, USG FLEX series 4.50–5.37 Patch 1, USG FLEX 50(W) 4.16–5.37 Patch 1, and USG20(W)-VPN 4.16–5.37 Patch 1. An attacker could ...

CVE-2023-6764

A format string vulnerability in a function of the IPSec VPN feature in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50W series firmware versions from 4.16 through 5.37 Patch 1, and USG20W-VPN series...

CVE-2023-6764

A format string vulnerability in a function of the IPSec VPN feature in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50W series firmware versions from 4.16 through 5.37 Patch 1, and USG20W-VPN series...

CVE-2023-6399

A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50W series firmware versions from 4.16 through 5.37 Patch 1, USG20W-VPN series firmware versions from 4.16 through 5.37...

CVE-2023-6399

A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50W series firmware versions from 4.16 through 5.37 Patch 1, USG20W-VPN series firmware versions from 4.16 through 5.37...

CVE-2023-6398

A post-authentication command injection vulnerability in the file upload binary in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50W series firmware versions from 4.16 through 5.37 Patch 1, USG20W-VPN...

CVE-2023-6398

CVE-2023-6398 is a post-authentication command-injection vulnerability in Zyxel devices where the file upload binary can be abused by an authenticated administrator to execute OS commands on the device via FTP. Affected products include ZyXEL ATP series (4.32–5.37 Patch 1), USG FLEX series (4.50–...

CVE-2023-6398

A post-authentication command injection vulnerability in the file upload binary in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50W series firmware versions from 4.16 through 5.37 Patch 1, USG20W-VPN...