Security Update (KB5094126) (26200.8655) pdf export problem

George Psim 20 Reputation points
2026-07-09T06:14:14.0966667+00:00

Hi there,

I use a crossword construction application and export the final result as a PDF in Greek.

After this update, when I open the PDF in Adobe Illustrator, the Greek characters are displayed incorrectly. They now appear as if they were Chinese characters.

I uninstalled the update, and everything is working correctly again.

However, this issue needs to be permanently resolved because I will encounter the same problem again with future updates.

Could you please investigate this issue and provide a permanent fix? Thank you.

Windows for home | Previous Windows versions | Performance and system failures
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Answer accepted by question author
Lychee-Ng 28,565 Reputation points Microsoft External Staff Moderator
2026-07-09T10:44:20.5066667+00:00

Hi Duminda Kuruppu,

Thanks for sharing your findings, and I can totally understand your concerns. Since the PDF displays correctly before the update and incorrectly afterward, this does appear to be a compatibility regression introduced with KB5094126. From your descriptions, it's clearly affecting how the PDF generated by your crossword application is interpreted by Adobe Illustrator.

That said, I need to note that Microsoft Q&A is just a community support forum. While your post may attract others who share your ideas, it's unlikely to be reviewed by Microsoft. Contributors here, as fellow users, do not have visibility into the internal system, cannot investigate or escalate issues directly to any engineering teams. Please consider:

  1. Report it through Microsoft’s official feedback and support channels, where the backend teams can review it:
    1. Press Win + F to open Feedback Hub > submit under relevant category (e.g. Windows Updates)
    2. I recommend using the same details you provided here, including screenshots if possible.
  2. Contact the crossword application's vendor to determine whether they have identified any new compatibility issues, as the PDF generation component may be interacting with Windows font services differently after the update.

Again, thank you for taking the time to share this issue. I know this is probably not the direct response you were hoping for, but Q&A contributors simply do not have the ability to proceed further. Feedback Hub is the channel most likely to reach the team responsible for investigating such behaviors.

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment". 

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  1. George Psim 20 Reputation points
    2026-07-09T10:57:37.4+00:00

    Hi there,

    thank you for your instructions. I understand that this is the right way to report the issue. I will do it right away!

    Best regards.

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