{"id":80909,"date":"2025-10-03T00:42:11","date_gmt":"2025-10-03T00:42:11","guid":{"rendered":""},"modified":"2025-10-29T11:38:52","modified_gmt":"2025-10-29T17:38:52","slug":"cve-2025-53734-use-after-free-vulnerability-in-microsoft-office-visio-allowing-unauthorized-code-execution","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-53734-use-after-free-vulnerability-in-microsoft-office-visio-allowing-unauthorized-code-execution\/","title":{"rendered":"<strong>CVE-2025-53734: Use-After-Free Vulnerability in Microsoft Office Visio Allowing Unauthorized Code Execution<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The CVE-2025-53734 vulnerability is a significant security flaw that affects Microsoft Office Visio, a crucial tool widely used for creating diagrams and flowcharts. This vulnerability stems from a use-after-free condition, which, if exploited, allows an unauthorized attacker to execute code locally. Given the widespread usage of Microsoft Office Visio across various sectors, this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-36855-buffer-over-read-vulnerability-in-diasymreader-dll-affecting-eol-asp-net-versions\/\"  data-wpil-monitor-id=\"88157\">vulnerability could potentially affect<\/a> a large number of users, thus making it a matter of grave concern.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-53734<br \/>\nSeverity: High (7.8 &#8211; CVSS Severity Score)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9364-critical-open-database-issue-resulting-in-potential-system-compromise\/\"  data-wpil-monitor-id=\"89069\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2684804253\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32705-out-of-bounds-read-vulnerability-in-microsoft-office-outlook\/\"  data-wpil-monitor-id=\"91768\">Microsoft Office<\/a> Visio | All prior to patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54897-deserialization-vulnerability-in-microsoft-office-sharepoint\/\"  data-wpil-monitor-id=\"89206\">vulnerability arises from a use-after-free condition in Microsoft Office<\/a> Visio. A use-after-free <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5037-memory-corruption-vulnerability-in-autodesk-revit-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"88113\">vulnerability occurs when a piece of memory<\/a> is freed (or de-allocated) but is still referenced later in the program. This can lead to unexpected behavior, including the potential for an attacker to manipulate the program to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47098-arbitrary-code-execution-vulnerability-in-incopy\/\"  data-wpil-monitor-id=\"88150\">execute arbitrary code<\/a>.<br \/>\nIn this case, an attacker who successfully exploits this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-37777-remote-code-execution-vulnerability-in-o2oa-v9-0-3\/\"  data-wpil-monitor-id=\"88575\">vulnerability could execute code<\/a> locally. This could enable the attacker to gain the same user rights as the current user, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9443-buffer-overflow-vulnerability-in-tenda-ch22-1-0-0-1-potentially-leads-to-system-compromise\/\"  data-wpil-monitor-id=\"89019\">potentially leading to system<\/a> compromise or data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2408185233\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>Below is a hypothetical example showing how an attacker could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-10534-critical-firefox-and-thunderbird-vulnerability-leading-to-possible-system-compromise-and-data-leakage\/\"  data-wpil-monitor-id=\"89447\">possibly exploit this vulnerability<\/a>. The attacker sends a specially crafted Visio file, which contains malicious code, to the victim.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/upload\/visiofile HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/vnd.ms-visio.drawing\n{ &quot;visio_file&quot;: &quot;[base64_encoded_malicious_visio_file]&quot; }<\/code><\/pre>\n<p>In this example, if the victim opens the malicious Visio file, the use-after-free condition is triggered, allowing the attacker&#8217;s <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-58757-remote-code-execution-vulnerability-in-monai-ai-toolkit\/\"  data-wpil-monitor-id=\"88596\">code to be executed<\/a>.<br \/>\nIt&#8217;s important to note that this is a simplified example for illustrative purposes only. Actual exploit <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6971-use-after-free-vulnerability-in-solidworks-edrawings-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"88622\">code<\/a> would likely be more complex and specific to the vulnerability in question.<\/p>\n<p><strong>Mitigation and Prevention<\/strong><\/p>\n<p><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30393-critical-use-after-free-vulnerability-in-microsoft-office-excel\/\"  data-wpil-monitor-id=\"91835\">Microsoft has already released a patch to address this vulnerability<\/a>. Users are strongly advised to apply this patch as soon as possible. If immediate patching is not feasible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation method. However, these are not long-term solutions and can only minimize risk, not eliminate it. Permanent mitigation can only be achieved by applying the vendor&#8217;s patch.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The CVE-2025-53734 vulnerability is a significant security flaw that affects Microsoft Office Visio, a crucial tool widely used for creating diagrams and flowcharts. This vulnerability stems from a use-after-free condition, which, if exploited, allows an unauthorized attacker to execute code locally. Given the widespread usage of Microsoft Office Visio across various sectors, this vulnerability [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[82],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-80909","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-microsoft"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/80909","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=80909"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/80909\/revisions"}],"predecessor-version":[{"id":85011,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/80909\/revisions\/85011"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=80909"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=80909"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=80909"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=80909"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=80909"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=80909"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=80909"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=80909"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=80909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}