VulnerabilityBleeping Computer
4.0 — MEDIUM
Microsoft: August updates break printing, PDF export in WPF apps
Microsoft has confirmed that .NET Framework updates released as part of the August 2026 Patch Tuesday are breaking printing and PDF export in WPF applications. [...]
🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview
A known issue with .NET Framework updates released as part of August 2026 Patch Tuesday is breaking printing and PDF export in some WPF applications, affecting Windows client releases and Windows Server from 2012 to 2025.
⚙️Technical Details
Affected Systems
Windows client releasesWindows Server (from 2012 to 2025)
Attack Vectors
PrintingPDF export
💥Impact Assessment
Severity: Medium
Who Is at Risk
Users of WPF applications on affected systems
🛡️Recommended Actions
1Apply the temporary fix to enable Switch.MS.Internal.TtfDelta.DisableCmapAndSbitOverflowProtection
2Monitor system logs for any signs of exploitation
3Keep .NET Framework updates up-to-date with caution
📦Affected Products
WPF applications.NET Framework
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