Security update against the WannaCrypt/ WannaCry ransomware


These are the security updates to address the WannaCrypt/ WannaCry ransomware which initially surfaced in 2017. You can update the Instrument’s OS by following the same procedure for a normal firmware update.


Applicable Product/ Version

The applicable products and versions are as follows.
The OS versions can be found on [SYSTEM]-<VERSION> screen.

Applicable Product OS Version
(to be updated)
OS Version
Update File
AQ6370D-12/ AQ6370D-22 R02.01 to R02.03 R02.04
AQ6370D-10/ AQ6370D-20 R01.01 R01.02
AQ6373B R01.01 R01.02
AQ6374 R01.01, R01.02 R01.03
AQ6375B R01.01, R01.02 R01.03
AQ6376 R01.01 to R01.04 R01.05
AQ6150/ AQ6151 R01.01, R01.02 R01.03


Failure phenomenon

When you connect a device in which the directory sharing setting is [ON] or the firewall setting is [OFF] to a network infected with ransomware, the device may reboot.
The reboot can be avoided by setting the directory sharing to [OFF] and the firewall to [ON] after the updated OS Version is installed.



The instrument runs on the Windows Embedded OS. Thus, the directory and files in the system area are protected and not rewritten by a virus attack. Also, files automatically created by the virus are not written and stored. Therefore, the device will not be infected by the virus or become the source of infection. However, the device will reboot when an unusual action by the virus occurs causing an access violation.




Please read Software Agreement carefully before downloading.


File Name
(for AQ6370D)
1.3 MB

(for AQ6373B)
1.3 MB

(for AQ6374)
1.3 MB

(for AQ6375B and AQ6376)
1.3 MB

(for AQ6150 and AQ6151)
1.3 MB


Type Software


* Software Agreement
  • The property rights, proprietary rights, intellectual property rights, and all other rights associated with the software are held by Yokogawa Electric Corporation.
  • Under no circumstances is any dumping, reverse compiling, reverse assembly, reverse engineering, or any other kind of alteration or revision of this software allowed.
  • This software is offered free of charge, but no unlimited warranties are made against any defects whatsoever.
  • Also, Yokogawa may not be able to accept inquiries regarding repair of defects in or questions about this software.
  • The contents of this software are subject to change without prior notice as a result of continuing improvements to the software\'s performance and functions.
  • Yokogawa bears no liability for any problems that may occur during download or installation of this software.
  • Use of the Yokogawa Web site is at the user\'s own risk.
  • Any parties contributing to the creation or distribution of the contents on the Yokogawa Web site shall bear no responsibility whatsoever for any damages occurring as a result of the use of said contents.

Downloading of the software indicates acceptance of the software agreement.

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