Microsoft KB5004238 Information

Lexmark Updated Drivers to fix Authentication after Microsoft July 13, 2021 Server Patches are applied.

On July 13th Microsoft released a service patch that addressed CVE-2021-33764 among other things. This patch made inoperative CAC and PIV smart card authentication on printer and multifunction devices of all manufactures, including Lexmark. This is detailed in Microsoft Knowledge Net Article KB5005408. Lexmark is the first manufacturer to provide a fix for this issue. The details are below.
Microsoft has created a temporary mitigation for this issue which the majority of the Department of Defense and federal agencies have adopted. This mitigation is set to be reversed in January of 2022. If your Lexmark MFP is relying on this mitigation, it is important that you apply the fixes below before the January 2022 date.

Actions/Changes to CAC/PIV-enabled Multi-Function Devices (MFDs) which must be performed:

Where the model number has two leading alpha character (CX### / MX###).
- The changes via an updated PIV driver 1.3.11.
- The changes via an updated PIV driver 1.3.11.
C748, C792, C925, C950, X548, X746, X748, X792, X925, X950, X952, and X954.
- These models require the steps detailed in KnowledgeBase SO9059.
Models that do not fit the description above are not currently planned too to be updated.
- Please contact your Lexmark Account Manager to replace the older devices or complete and submit the Request Information form section on this page for someone to contact you. These older models should work with the mitigation detailed in KB5005408. However, they will not work once the mitigation is reversed in January 2022.

User impact if the above actions/changes to CAC/PIV-enabled MFDs are not performed:

Smartcard Authentication on MFDs will fail come February 2022.

For additional instructions and to receive the necessary software to prepare my Lexmark multifunction device, please fill in the Request Information form section on this page.

CAC Modernization Request Information

To access detailed instructions and the required MFD update files or if you would like to have your Lexmark Account Manager contact you, please complete and submit this form.

Need other technical assistance with your CAC Modernization efforts please contact our Technical Support Center at:

For DOD CONUS Support 1-800-Lexmark (539-6275) Option 1, Option 2, Option 2.

For DOD OCONUS SUPPORT OCONUSSolSup@lexmark.com to open new cases or ask for updates.

First name

Last name

DoD Installation/Facility

Optional (Comments, Phone #, etc.)

Yes, I would like my Lexmark Account Manager to contact me regarding my Lexmark multifunction devices and the new mandated regulatory compliance on CAC Modernization and Microsoft KB5004238.

I agree that the personal data I provide may be stored and used to send me marketing materials and surveys and for Lexmark's research purposes. I understand that my agreement to permit Lexmark to process my information is voluntary and that I can at any time revoke my permission. If you do not agree to the use of your personal data, please do not disclose any such information to Lexmark. Please note that in this case Lexmark may not be able to send you information and certain features of Lexmark's websites may not function properly. The terms of the Privacy Statement, available at lexmark.com/en_us/privacy-policy.html shall apply to personal data you submit.

Thanks for your request

The additional instructions and the necessary software needed to prepare your Lexmark multifunction devices are provided via this link – CAC Modernization Instructions.

Untitled Document