{"id":64291,"date":"2025-08-24T16:16:08","date_gmt":"2025-08-24T16:16:08","guid":{"rendered":""},"modified":"2025-10-10T00:32:35","modified_gmt":"2025-10-10T06:32:35","slug":"cve-2025-53733-microsoft-office-word-numeric-type-conversion-vulnerability","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-53733-microsoft-office-word-numeric-type-conversion-vulnerability\/","title":{"rendered":"<strong>CVE-2025-53733: Microsoft Office Word Numeric Type Conversion Vulnerability<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In the world of cybersecurity, a newly discovered vulnerability has emerged that affects Microsoft Office Word, a widely used software by individuals and organizations alike. The vulnerability, dubbed CVE-2025-53733, arises from an incorrect conversion between numeric types within the software, opening opportunities for attackers to execute code locally on the victim&#8217;s system. Given the prevalence of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47168-use-after-free-vulnerability-in-microsoft-office-word-allowing-unauthorized-code-execution\/\"  data-wpil-monitor-id=\"73068\">Microsoft Office Word and the severity of this vulnerability<\/a>, it is a significant concern for both individual users and IT administrators.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-53733<br \/>\nSeverity: High (8.4 CVSS Score)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: Required<br \/>\nImpact: Successful exploitation of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-33075-a-critical-windows-installer-vulnerability-that-leads-to-privilege-elevation\/\"  data-wpil-monitor-id=\"72444\">vulnerability could lead<\/a> to system compromise or data leakage.<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3637953748\" 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>Microsoft <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53762-privilege-elevation-vulnerability-in-microsoft-purview\/\"  data-wpil-monitor-id=\"72917\">Office Word<\/a> | All versions up to and including the latest version at the time of the vulnerability discovery.<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit works by <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54910-exploiting-heap-based-buffer-overflow-in-microsoft-office\/\"  data-wpil-monitor-id=\"89536\">exploiting an incorrect conversion between numeric types in Microsoft<\/a> Word. Specifically, an attacker crafts a specially formatted file that, when opened in Microsoft Word, triggers the flaw, allowing the attacker to execute <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32451-memory-corruption-vulnerability-in-foxit-reader-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"74452\">arbitrary code<\/a> in the context of the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52289-broken-access-control-vulnerability-in-magnusbilling-v7-8-5-3\/\"  data-wpil-monitor-id=\"73366\">vulnerability could take control<\/a> of an affected system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2778988569\" 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>The following is a conceptual example of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8714-critical-postgresql-vulnerability-allowing-malicious-code-injection-by-superusers\/\"  data-wpil-monitor-id=\"80765\">vulnerability might be exploited using a malicious<\/a> Word document:<\/p>\n<pre><code class=\"\" data-line=\"\"># Attacker creates a malicious Word document\necho &quot;{ malicious_code: &#039;...&#039;}&quot; &gt; exploit.docx\n# Attacker sends the malicious document to the victim\nmail -s &quot;Important Document&quot; victim@example.com &lt; exploit.docx<\/code><\/pre>\n<p>In this example, the attacker creates a malicious Word document containing the exploit <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27577-arbitrary-code-execution-in-openharmony-via-race-condition-vulnerability\/\"  data-wpil-monitor-id=\"76227\">code and sends it to the victim via<\/a> email. If the victim opens the document, the exploit code is executed, potentially compromising the system or leading to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53495-unauthorized-access-data-leakage-in-wikimedia-foundation-mediawiki-abusefilter-extension\/\"  data-wpil-monitor-id=\"72595\">data leakage<\/a>.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>Users and administrators are advised to apply the latest patches from <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47170-use-after-free-vulnerability-in-microsoft-office-word\/\"  data-wpil-monitor-id=\"75406\">Microsoft for Office<\/a> Word as soon as they become available. Until the patch is available or applied, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary mitigation to detect and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27043-memory-corruption-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"75407\">potentially block attempts to exploit this vulnerability<\/a>. Furthermore, users should be wary of opening Word documents from untrusted sources, as they could contain malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6204-code-injection-vulnerability-in-delmia-apriso\/\"  data-wpil-monitor-id=\"73996\">code exploiting this vulnerability<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In the world of cybersecurity, a newly discovered vulnerability has emerged that affects Microsoft Office Word, a widely used software by individuals and organizations alike. The vulnerability, dubbed CVE-2025-53733, arises from an incorrect conversion between numeric types within the software, opening opportunities for attackers to execute code locally on the victim&#8217;s system. Given the [&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-64291","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\/64291","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=64291"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64291\/revisions"}],"predecessor-version":[{"id":82379,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64291\/revisions\/82379"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=64291"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=64291"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=64291"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=64291"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=64291"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=64291"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=64291"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=64291"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=64291"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}