{"id":12003,"date":"2026-04-10T07:03:28","date_gmt":"2026-04-10T07:03:28","guid":{"rendered":"https:\/\/serisec.com\/index.php\/2026\/04\/10\/adobe-reader-zero-day-exploited-via-html\/"},"modified":"2026-04-10T07:03:28","modified_gmt":"2026-04-10T07:03:28","slug":"adobe-reader-zero-day-exploited-via-html","status":"publish","type":"post","link":"https:\/\/serisec.com\/index.php\/2026\/04\/10\/adobe-reader-zero-day-exploited-via-html\/","title":{"rendered":"Adobe Reader Zero-Day Exploited via Malicious PDFs Since December 2025"},"content":{"rendered":"<p>    Adobe Reader Zero-Day Exploited via Malicious PDFs Since December 2025<br \/>\n \t<BR><br \/>\n<BR><\/BR><br \/>\n    <!-- no image --><br \/>\n \t<BR><br \/>\n<BR><\/BR><\/p>\n<div>Threat actors have been exploiting a previously unknown zero-day vulnerability in Adobe Reader using maliciously crafted PDF documents since at least December\u00a02025.<br \/>\nThe finding, detailed by EXPMON&#8217;s Haifei Li, has\u00a0been described as a highly-sophisticated PDF exploit.\u00a0The artifact (&#8220;Invoice540.pdf&#8221;) first appeared on the VirusTotal platform on November 28, 2025.\u00a0A second\u00a0<\/div>\n<p> \t<BR><br \/>\n <BR><\/BR><\/p>\n<p> \t<BR><br \/>\n<BR><\/BR><br \/>\n<a href=\"https:\/\/thehackernews.com\/2026\/04\/adobe-reader-zero-day-exploited-via.html\">Go to TheHackersNews<\/a><br \/>\n \t<BR><br \/>\n <BR><\/BR><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Adobe Reader Zero-Day Exploited via Malicious PDFs Since December 2025 Threat actors have been exploiting a previously unknown zero-day vulnerability in Adobe Reader using maliciously crafted PDF documents since at least December\u00a02025. The finding, detailed by EXPMON&#8217;s Haifei Li, has\u00a0been described as a highly-sophisticated PDF exploit.\u00a0The artifact (&#8220;Invoice540.pdf&#8221;) first appeared on the VirusTotal platform on [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[60],"tags":[76],"class_list":["post-12003","post","type-post","status-publish","format-standard","hentry","category-thehackersnews","tag-thehackersnews"],"_links":{"self":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/12003"}],"collection":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/comments?post=12003"}],"version-history":[{"count":0,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/posts\/12003\/revisions"}],"wp:attachment":[{"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/media?parent=12003"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/categories?post=12003"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/serisec.com\/index.php\/wp-json\/wp\/v2\/tags?post=12003"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}