{"id":2692,"date":"2026-04-24T10:11:28","date_gmt":"2026-04-24T14:11:28","guid":{"rendered":"https:\/\/www.yorku.ca\/uit\/infosec\/?p=2692"},"modified":"2026-04-24T10:11:31","modified_gmt":"2026-04-24T14:11:31","slug":"adobe-acrobat-security-vulnerability-cve-2026-34621","status":"publish","type":"post","link":"https:\/\/www.yorku.ca\/uit\/infosec\/2026\/04\/24\/adobe-acrobat-security-vulnerability-cve-2026-34621\/","title":{"rendered":"Adobe Acrobat security vulnerability (CVE-2026-34621)"},"content":{"rendered":"\n<p>A recently disclosed high\u2011severity vulnerability in Adobe Acrobat and Acrobat Reader (<strong>CVE\u20112026\u201134621<\/strong>) allows attackers to execute arbitrary code on affected systems by tricking users into opening a specially crafted PDF file.<\/p>\n\n\n\n<p><strong>Severity level<\/strong><strong>&nbsp;<\/strong><\/p>\n\n\n\n<p>CVSS Score: 8.6\/High.<\/p>\n\n\n\n<p>Description:- &nbsp;Adobe Acrobat and Acrobat Reader contain an improperly controlled modification of object prototype attributes (Prototype Pollution) vulnerability. The flaw exists in the handling of JavaScript objects within PDF documents.<\/p>\n\n\n\n<p>In vulnerable versions, opening a maliciously crafted PDF allows an attacker to manipulate JavaScript object prototypes and invoke privileged APIs. This can result in arbitrary code execution in the context of the current user.<\/p>\n\n\n\n<p><strong>Affected Versions\u00a0:-\u00a0 \u00a0<\/strong><\/p>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Acrobat DC: 26.001.21367 and earlier.<\/li>\n\n\n\n<li>Acrobat Reader DC: 26.001.21367 and earlier.<\/li>\n\n\n\n<li>Acrobat 2024: 24.001.30356 and earlier.<\/li>\n\n\n\n<li>Platforms: Windows and macOS.<\/li>\n<\/ul>\n\n\n\n<p><strong>Impact:-<\/strong><\/p>\n\n\n\n<p>Successful exploitation may result in arbitrary code execution on the affected system.<\/p>\n\n\n\n<p><strong>Resolution:-<\/strong><\/p>\n\n\n\n<p>Adobe strongly recommends immediately upgrading to the latest patched versions:<\/p>\n\n\n\n<p>Acrobat DC \/ Acrobat Reader DC: 26.001.21411 or later.<\/p>\n\n\n\n<p>Acrobat 2024: Windows: 24.001.30362 or later and macOS: 24.001.30360 or later.<\/p>\n\n\n\n<p><strong>Reference:-<\/strong><\/p>\n\n\n\n<p><a href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2026-34621\">https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2026-34621<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/helpx.adobe.com\/security\/products\/acrobat\/apsb26-43.html\">https:\/\/helpx.adobe.com\/security\/products\/acrobat\/apsb26-43.html<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.cyber.gc.ca\/en\/alerts-advisories\/adobe-acrobat-security-advisory-av26-340\">https:\/\/www.cyber.gc.ca\/en\/alerts-advisories\/adobe-acrobat-security-advisory-av26-340<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.tenable.com\/cve\/CVE-2026-34621\">https:\/\/www.tenable.com\/cve\/CVE-2026-34621<\/a><\/p>\n\n\n\n<p>UIT Information&nbsp;Security<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A recently disclosed high\u2011severity vulnerability in Adobe Acrobat and Acrobat Reader (CVE\u20112026\u201134621) allows attackers to execute arbitrary code on affected systems by tricking users into opening a specially crafted PDF file. Severity level&nbsp; CVSS Score: 8.6\/High. Description:- &nbsp;Adobe Acrobat and Acrobat Reader contain an improperly controlled modification of object prototype attributes (Prototype Pollution) vulnerability. The [&hellip;]<\/p>\n","protected":false},"author":2694,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","ngg_post_thumbnail":0,"footnotes":""},"categories":[31],"tags":[],"class_list":["post-2692","post","type-post","status-publish","format-standard","hentry","category-vulnerabilities"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Adobe Acrobat security vulnerability (CVE-2026-34621) - Information Security<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.yorku.ca\/uit\/infosec\/2026\/04\/24\/adobe-acrobat-security-vulnerability-cve-2026-34621\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Adobe Acrobat security vulnerability (CVE-2026-34621) - Information Security\" \/>\n<meta property=\"og:description\" content=\"A recently disclosed high\u2011severity vulnerability in Adobe Acrobat and Acrobat Reader (CVE\u20112026\u201134621) allows attackers to execute arbitrary code on affected systems by tricking users into opening a specially crafted PDF file. Severity level&nbsp; CVSS Score: 8.6\/High. Description:- &nbsp;Adobe Acrobat and Acrobat Reader contain an improperly controlled modification of object prototype attributes (Prototype Pollution) vulnerability. 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