Firewall
ZyXEL

ZyXEL ZyXEL USG FLEX 100W

- The ZyXEL USG FLEX 100W is a compact, all-in-one firewall device that provides robust network security and flexibility.

ZyXEL ZyXEL USG FLEX 100W

Specifications

OS
ZyNOS
CPU
Quad-core 1.2 GHz
IDS/IPS
450 Mbps
LAN
4x GE
RAM
1 GB
USB
1x USB 3.0
UTM
350 Mbps

Potential Threats

7
Critical
13
High
5
Medium
0
Low

25 Known CVEs

7 critical vulnerabilities found — immediate patching required.
13 high-severity vulnerabilities — patch as soon as possible.
Audit firewall rules and remove unused allow entries. Enable detailed logging. Restrict management access to trusted IPs only.

Default IP

192.168.168.1

Default admin panel address for ZyXEL ZyXEL USG FLEX 100W

Default Credentials — ZyXEL ZyXEL USG FLEX 100W

Username Password Access Type Protocol Port Notes
web HTTPS 443
ssh SSH 22
console console

Known CVE Vulnerabilities (25)

Sort:
CVE-2023-27975 2024

CWE-522: Insufficiently Protected Credentials vulnerability exists that could cause unauthorized access to the project file in EcoStruxure Control Ex...

7.1
CVE-2023-33012 2023

A command injection vulnerability in the configuration parser of the Zyxel ATP series firmware versions 5.10 through 5.36 Patch 2, USG FLEX series fir...

8.8
CVE-2023-27992 2023

The pre-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.14)C0, NAS540 firmware versions prior...

9.8
CVE-2023-27989 2023

A buffer overflow vulnerability in the CGI program of the Zyxel NR7101 firmware versions prior to V1.00(ABUV.8)C0 could allow a remote authenticated...

6.5
CVE-2023-27988 2023

The post-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.13)C0 could allow an authenticated a...

7.2
CVE-2023-33010 2023

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 firmwar...

9.8
CVE-2023-33009 2023

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...

9.8
CVE-2023-27973 2023

Certain HP LaserJet Pro print products are potentially vulnerable to Heap Overflow and/or Remote Code Execution.

9.8
CVE-2023-28771 2023

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 FL...

9.8
CVE-2023-27991 2023

The post-authentication command injection vulnerability in the CLI command of Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series fi...

8.8

Showing 10 of 25

FAQ

What is the default password for ZyXEL ZyXEL USG FLEX 100W?

The most common default credentials for ZyXEL ZyXEL USG FLEX 100W are listed in the table above. Always change these immediately after setup.

What is the default username for ZyXEL ZyXEL USG FLEX 100W?

The default username for ZyXEL ZyXEL USG FLEX 100W is typically "admin". The full list of default credentials including username, password, access type and port is shown in the table on this page.

How do I change the password on ZyXEL ZyXEL USG FLEX 100W?

Log in to the admin panel using the default credentials listed above. Navigate to Administration → Password or System → Account settings. Enter the current password and set a new strong password. Save the changes.

How do I reset ZyXEL ZyXEL USG FLEX 100W to factory defaults?

Locate the Reset button (usually a small pinhole on the back/bottom of the device). Hold it for 10-30 seconds while powered on until the LEDs flash. The device will reboot with default settings.

Is it safe to leave default credentials unchanged?

No. Default credentials are publicly known and frequently exploited by automated scanners. Change the admin password immediately after first login.

Does ZyXEL ZyXEL USG FLEX 100W have known security vulnerabilities?

ZyXEL ZyXEL USG FLEX 100W has 25 known CVE vulnerabilities documented in our database. The full list with severity ratings is shown on this page. Apply the latest firmware update from the manufacturer to address known issues.

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