ABB Cylon FLXeon 9.3.4 Default Credentials

vendor:

FLXeon Series, CBX Series, CBT Series, CBV Series, ABB UC32 Series Main Plant Controllers

by:

Gjoko 'LiquidWorm' Krstic

6.1

CVSS

HIGH

Default Credentials

798

CWE

Product Name: FLXeon Series, CBX Series, CBT Series, CBV Series, ABB UC32 Series Main Plant Controllers

Affected Version From: FLXeon Series (FBXi Series, FBTi Series, FBVi Series), CBX Series (FLX Series), CBT Series, CBV Series, ABB UC32 Series Main Plant Controllers (Cylon's UnitronUC32.xx) with firmware <=9.3.4

Affected Version To:

Patch Exists: NO

Related CWE:

CPE: h:abb:cylon_flxeon:9.3.4

Metasploit:

Other Scripts:

Platforms Tested: Linux, NodeJS, Express

2024

ABB Cylon FLXeon 9.3.4 Default Credentials

The ABB Cylon FLXeon BACnet controller in versions <=9.3.4 uses weak default administrative credentials, which can be exploited in remote password attacks to gain unauthorized access and full control of the system.

Mitigation:

Change the default administrative credentials immediately after installation to strong, unique passwords to mitigate this vulnerability.

Source

Exploit-DB raw data:

ABB Cylon FLXeon 9.3.4 Default Credentials


Vendor: ABB Ltd.
Product web page: https://www.global.abb                   
Affected version: FLXeon Series (FBXi Series, FBTi Series, FBVi Series)
                  CBX Series (FLX Series)
                  CBT Series
                  CBV Series
                  ABB UC32 Series Main Plant Controllers (Cylon's UnitronUC32.xx)
                  Firmware: <=9.3.4

Summary: BACnet® Smart Building Controllers. ABB's BACnet portfolio features a
series of BACnet® IP and BACnet MS/TP field controllers for ASPECT® and INTEGRA™
building management solutions. ABB BACnet controllers are designed for intelligent
control of HVAC equipment such as central plant, boilers, chillers, cooling towers,
heat pump systems, air handling units (constant volume, variable air volume, and
multi-zone), rooftop units, electrical systems such as lighting control, variable
frequency drives and metering.

The FLXeon Controller Series uses BACnet/IP standards to deliver unprecedented
connectivity and open integration for your building automation systems. It's scalable,
and modular, allowing you to control a diverse range of HVAC functions.

Desc: The ABB Cylon FLXeon BACnet controller uses a weak set of default administrative
credentials that can be guessed in remote password attacks and gain full control of
the system.

Tested on: Linux Kernel 5.4.27
           Linux Kernel 4.15.13
           NodeJS/8.4.0
           Express


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience


Advisory ID: ZSL-2025-5919
Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2025-5919.php


21.04.2024

--


$ cat project

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$ cat cyloncreds.txt
admin:cylonctl
cxpro:siteguide
UC32Net:CylonCtl