[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f1AMsMdKwHuy-w2fKC6B2ndckP_DtK6GY-VdW57KtZQg":3},{"article":4,"iocs":38,"watch_terms":39,"solutions":40,"lesson":88},{"id":5,"title":6,"slug":7,"summary":8,"ai_summary":9,"brief":10,"url":11,"image_url":12,"published_at":13,"ingested_at":14,"relevance_score":15,"entities":16,"category_id":25,"category":26,"article_tags":30},"aeaaf74e-fc2c-490f-a613-919bd56c4107","Microsoft: August updates break printing, PDF export in WPF apps","microsoft-august-updates-break-printing-pdf-export-in-wpf-apps-a0a0d8","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. [...]","Microsoft has confirmed that its August 2026 .NET Framework cumulative updates are causing printing and PDF export failures in Windows Presentation Foundation (WPF) applications. The issue, which affects various Windows client and server versions, occurs when generating content with specific fonts like Calibri. Microsoft has provided a temporary workaround involving an AppContext switch, but warns this may disable security protections.","Microsoft August 2026 .NET Framework updates break printing and PDF export in WPF apps.","https:\u002F\u002Fwww.bleepingcomputer.com\u002Fnews\u002Fmicrosoft\u002Fmicrosoft-august-updates-break-printing-pdf-export-in-wpf-apps\u002F","https:\u002F\u002Fwww.bleepstatic.com\u002Fcontent\u002Fhl-images\u002F2026\u002F08\u002F24\u002FPrinter-printing-error.jpg","2026-08-24T12:40:21+00:00","2026-08-24T14:00:18.549559+00:00",7,[17,20,22],{"name":18,"type":19},".NET Framework","product",{"name":21,"type":19},"WPF",{"name":23,"type":24},"Microsoft","vendor","80544778-fabb-4dcd-aa35-17492e5dcf4f",{"id":25,"icon":27,"name":28,"slug":29},null,"Vulnerabilities","vulnerabilities",[31,36],{"category":32},{"id":33,"icon":27,"name":34,"slug":35},"02371804-cf6d-4449-98de-f1a2d4d9b266","Tools","tools",{"category":37},{"id":25,"icon":27,"name":28,"slug":29},[],[23,18,21],{"controls":41,"vendors":84},[42,70],{"slug":43,"name":44,"problem":45,"products":46},"patch-management","Automated patch management","Known holes get closed in days, not months.",[47,54,62],{"vendor_slug":48,"vendor_name":23,"vendor_logo":49,"product_slug":50,"product_name":51,"url":52,"description":53},"microsoft","\u002Fvendor-logos\u002Fmicrosoft.png","intune","Microsoft Intune","https:\u002F\u002Fwww.microsoft.com\u002Fen-us\u002Fsecurity\u002Fbusiness\u002Fmicrosoft-intune","Device management for Windows, macOS, iOS and Android, including update rings and compliance policies.",{"vendor_slug":55,"vendor_name":56,"vendor_logo":57,"product_slug":58,"product_name":59,"url":60,"description":61},"manageengine","ManageEngine","\u002Fvendor-logos\u002Fmanageengine.png","patch-manager-plus","ManageEngine Patch Manager Plus","https:\u002F\u002Fwww.manageengine.com\u002Fpatch-management\u002F","Patch management for operating systems and third-party applications, on premises or in the cloud.",{"vendor_slug":63,"vendor_name":64,"vendor_logo":65,"product_slug":66,"product_name":67,"url":68,"description":69},"action1","Action1","\u002Fvendor-logos\u002Faction1.png","action1-patch-management","Action1 Patch Management","https:\u002F\u002Fwww.action1.com\u002F","Cloud-native patch management for Windows, macOS and third-party applications.",{"slug":71,"name":72,"problem":73,"products":74},"endpoint-management","Device management (MDM and UEM)","Every company laptop and phone is known, encrypted, locked down and up to date.",[75,76],{"vendor_slug":48,"vendor_name":23,"vendor_logo":49,"product_slug":50,"product_name":51,"url":52,"description":53},{"vendor_slug":77,"vendor_name":78,"vendor_logo":79,"product_slug":80,"product_name":81,"url":82,"description":83},"ninjaone","NinjaOne","\u002Fvendor-logos\u002Fninjaone.png","ninjaone-patch-management","NinjaOne Patch Management","https:\u002F\u002Fwww.ninjaone.com\u002Fpatch-management\u002F","Automated patching of operating systems and third-party applications from the cloud.",[85],{"slug":48,"name":23,"logo_path":49,"roles":86},[87],"affected",{"slug":89,"title":90,"body":91,"framework_refs":92,"framework_notes":102},"august-net-update-breaks-wpf-printing-patch-trade-offs-demand-careful-rollout","August .NET Update Breaks WPF Printing — Patch Trade-offs Demand Careful Rollout","Microsoft's August 2026 cumulative .NET Framework update introduced a regression that breaks printing and PDF export in WPF applications when specific fonts such as Calibri are used. This highlights the persistent tension between applying security patches promptly and ensuring application stability in production environments. The offered workaround — an AppContext switch — explicitly disables security protections, forcing organizations into a difficult choice between operational continuity and security posture. This situation underscores why organizations must have structured patch testing pipelines and rollback capabilities before deploying cumulative updates broadly. Without these controls, a single faulty update can cause widespread business disruption across both client and server environments.",[93,94,95,96,97,98,99,100,101],"CIS Control 7.3 — Perform Automated Operating System Patch Management","CIS Control 7.4 — Perform Automated Application Patch Management","CIS Control 4.1 — Establish and Maintain a Software Inventory","NIST SP 800-40 Rev. 4 — Guide to Enterprise Patch Management Planning","NIST SP 800-128 — Guide for Security-Focused Configuration Management","NIST CM-3 — Configuration Change Control","NIST SI-2 — Flaw Remediation","ITIL Change Management — Change Advisory Board (CAB) review for standard changes","ITIL Problem Management — Known Error Record for confirmed vendor regression",{}]