Microsoft: August updates break printing, PDF export in WPF apps
BLUF
August 2026 .NET Framework updates are breaking print and PDF functionality in WPF apps.
NEWS
Microsoft confirmed that the .NET Framework updates included in the August 2026 Patch Tuesday cycle introduce a regression affecting Windows Presentation Foundation applications. Users attempting to print or export documents to PDF within these applications are experiencing failures due to this unintended side effect of the security patches.
Why I Care
This impacts any organization relying on custom WPF software for document workflows, potentially halting critical business processes like invoicing, reporting, or record-keeping until resolved. The stakes involve operational downtime and potential data loss if documents cannot be archived or shared.
Next Steps
System administrators should test the August 2026 updates in a staging environment before deployment and consider uninstalling the specific .NET Framework patches if production issues arise. Developers should monitor Microsoft's official advisory for hotfixes or workarounds, while end-users should report functionality loss to IT support immediately.
Source: BleepingComputer ·