{"id":135581,"date":"2026-08-25T14:52:20","date_gmt":"2026-08-25T05:52:20","guid":{"rendered":"https:\/\/softantenna.com\/blog\/?p=135581"},"modified":"2026-08-25T14:54:41","modified_gmt":"2026-08-25T05:54:41","slug":"windows-update-wpf-printing-bug-2026-08","status":"publish","type":"post","link":"https:\/\/softantenna.com\/blog\/windows-update-wpf-printing-bug-2026-08\/","title":{"rendered":"WPF\u30a2\u30d7\u30ea\u306e\u5370\u5237\u30fbPDF\u51fa\u529b\u304c\u7a81\u7136\u5931\u6557\u3059\u308b\u554f\u984c\u3001\u539f\u56e0\u306f8\u6708\u306eWindows\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3060\u3063\u305f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/softantenna.com\/blog\/wp-content\/uploads\/2026\/08\/pexels-jakubzerdzicki-23534042.webp\" alt=\"\" width=\"1280\" height=\"854\" class=\"aligncenter size-full wp-image-135582\" \/><\/p>\n<p>2026\u5e748\u6708\u306e.NET Framework\u7528\u306e\u6708\u4f8b\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3067\u3001.NET Framework\u3092\u5229\u7528\u3059\u308bWPF\u30a2\u30d7\u30ea\u306e\u5370\u5237\u3084PDF\/XPS\u51fa\u529b\u304c\u6b63\u5e38\u306b\u52d5\u4f5c\u3057\u306a\u304f\u306a\u308b\u554f\u984c\u304c\u767a\u751f\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>Microsoft\u306f<a href=\"https:\/\/support.microsoft.com\/en-us\/servicing\/dotnetframework\/windows-11\/25h2\/august-11-2026-kb5120708-cumulative-update-for-net-framework-3-5-and-4-8-1-for-windows-11-version-25\">KB5120708<\/a>\u3001<a href=\"https:\/\/support.microsoft.com\/en-us\/servicing\/dotnetframework\/2026\/08\/august-11-2026-kb5120705-cumulative-update-for-net-framework-3-5-and-4-8-for-windows-server-2022\">KB5120705<\/a>\u3001<a href=\"https:\/\/support.microsoft.com\/en-us\/servicing\/dotnetframework\/windows-11\/24h2\/2026\/08\/august-11-2026-kb5120710-cumulative-update-for-net-framework-3-5-and-4-8-1-for-windows-11-version-24\">KB5120710<\/a>\u306a\u3069\u3001\u5404.NET Framework\u7528\u306e\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u65e2\u77e5\u306e\u4e0d\u5177\u5408\u3068\u3057\u3066\u60c5\u5831\u3092\u516c\u958b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u5f71\u97ff\u7bc4\u56f2\u3068\u767a\u751f\u3057\u3066\u3044\u308b\u75c7\u72b6<\/h2>\n<p>\u4eca\u56de\u306e\u4e0d\u5177\u5408\u306f<strong>\u7279\u5b9a\u30d5\u30a9\u30f3\u30c8(\u4f8b: Calibri)\u3092\u4f7f\u3063\u305f\u5370\u5237\u3084PDF\/XPS\u751f\u6210\u6642\u306bSystem.IO.FileFormatException\u304c\u767a\u751f\u3059\u308b<\/strong>\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u5f71\u97ff\u3059\u308bOS\u306f\u5e45\u5e83\u304f\u4ee5\u4e0b\u306e\u74b0\u5883\u3092\u542b\u307f\u307e\u3059\u3002<\/p>\n<ul>\n<li>Windows 10<\/li>\n<li>Windows 11<\/li>\n<li>Windows Server 2012 \uff5e 2025<\/li>\n<\/ul>\n<p>WPF\u3092\u4f7f\u3063\u305f\u696d\u52d9\u30a2\u30d7\u30ea\u3092\u904b\u7528\u3057\u3066\u3044\u308b\u74b0\u5883\u3067\u306f\u3001\u304b\u306a\u308a\u5e83\u7bc4\u56f2\u3067\u5f71\u97ff\u304c\u51fa\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>Microsoft\u304c\u6848\u5185\u3057\u3066\u3044\u308b\u66ab\u5b9a\u56de\u907f\u7b56<\/h2>\n<p>\u6052\u4e45\u7684\u306a\u4fee\u6b63\u306f\u307e\u3060\u8abf\u67fb\u4e2d\u3068\u306e\u3053\u3068\u3067\u3059\u304c\u3001Microsoft\u306f\u30a2\u30d7\u30ea\u5074\u3067\u4e00\u6642\u7684\u306b\u56de\u907f\u3059\u308b\u65b9\u6cd5\u3092\u6848\u5185\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u305d\u308c\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u69cb\u6210\u30d5\u30a1\u30a4\u30eb\u306b\u4ee5\u4e0b\u306e\u8a18\u8ff0\u3092\u8ffd\u52a0\u3057\u3066\u3001Switch.MS.Internal.TtfDelta.DisableCmapAndSbitOverflowProtection AppContext\u30b9\u30a4\u30c3\u30c1\u3092\u6709\u52b9\u306b\u3059\u308b\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002<\/p>\n<pre>\r\n&lt;configuration&gt;\r\n &lt;runtime&gt;\r\n   &lt;AppContextSwitchOverrides\r\n     value=&quot;Switch.MS.Internal.TtfDelta.DisableCmapAndSbitOverflowProtection=true&quot;\/&gt;\r\n &lt;\/runtime&gt;\r\n&lt;\/configuration&gt;\r\n<\/pre>\n<p>\u305f\u3060\u3057\u3001\u3053\u306e\u8a2d\u5b9a\u3092\u6709\u52b9\u306b\u3059\u308b\u3068 8\u6708\u66f4\u65b0\u3067\u5c0e\u5165\u3055\u308c\u305f\u30d5\u30a9\u30f3\u30c8\u95a2\u9023\u306e\u4fdd\u8b77\u6a5f\u80fd\u304c\u7121\u52b9\u5316\u3055\u308c\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u304c\u9ad8\u307e\u308b\u3068 Microsoft\u306f\u8b66\u544a\u3057\u3066\u3044\u307e\u3059\u3002\u300c\u672c\u5f53\u306b\u5fc5\u8981\u306a\u5834\u5408\u306e\u307f\u3001\u4e00\u6642\u7684\u306b\u4f7f\u3046\u3079\u304d\u300d\u3068\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n<h2>\u307e\u3068\u3081\uff1a\u696d\u52d9\u30a2\u30d7\u30ea\u904b\u7528\u8005\u306f\u8981\u6ce8\u610f<\/h2>\n<p>\u4eca\u56de\u306e\u4e0d\u5177\u5408\u306f\u5370\u5237\u3084PDF\u51fa\u529b\u3068\u3044\u3063\u305f\u696d\u52d9\u30a2\u30d7\u30ea\u3067\u983b\u7e41\u306b\u4f7f\u308f\u308c\u308b\u6a5f\u80fd\u304c\u76f4\u63a5\u5f71\u97ff\u3092\u53d7\u3051\u308b\u305f\u3081\u3001\u4f01\u696d\u3084\u73fe\u5834\u3067\u306e\u6df7\u4e71\u304c\u8d77\u304d\u3084\u3059\u3044\u5185\u5bb9\u3067\u3059\u3002Microsoft\u306f\u4fee\u6b63\u306b\u5411\u3051\u3066\u8abf\u67fb\u4e2d\u3068\u306e\u3053\u3068\u306a\u306e\u3067\u3001\u904b\u7528\u5074\u3067\u306f\u3001\u5f71\u97ff\u304c\u3067\u3066\u3044\u308b\u30a2\u30d7\u30ea\u3092\u78ba\u8a8d\u3057\u3001\u5fc5\u8981\u3067\u3042\u308c\u3070\u66ab\u5b9a\u56de\u907f\u7b56\u3092\u9069\u7528\u3057\u305f\u4e0a\u3067\u3001\u6052\u4e45\u4fee\u6b63\u306e\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3092\u5f85\u3064\u3068\u3044\u3046\u306e\u304c\u73fe\u5b9f\u7684\u306a\u5bfe\u5fdc\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>[via <a href=\"https:\/\/www.bleepingcomputer.com\/news\/microsoft\/microsoft-august-updates-break-printing-pdf-export-in-wpf-apps\/\">BleepingComputer<\/a>]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>2026\u5e748\u6708\u306e.NET Framework\u7528\u306e\u6708\u4f8b\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\u3067\u3001.NET Framework\u3092\u5229\u7528\u3059\u308bWPF\u30a2\u30d7\u30ea\u306e\u5370\u5237\u3084PDF\/XPS\u51fa\u529b\u304c\u6b63\u5e38\u306b\u52d5\u4f5c\u3057\u306a\u304f\u306a\u308b\u554f\u984c\u304c\u767a\u751f\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3057\u305f\u3002 Microso [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":135582,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[3],"tags":[3298,4387,2800],"class_list":["post-135581","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-windows","tag-windows","tag-windows11","tag-wpf"],"_links":{"self":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts\/135581","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/comments?post=135581"}],"version-history":[{"count":0,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts\/135581\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/media\/135582"}],"wp:attachment":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/media?parent=135581"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/categories?post=135581"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/tags?post=135581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}