{"id":62143,"date":"2025-08-08T08:25:02","date_gmt":"2025-08-08T08:25:02","guid":{"rendered":""},"modified":"2025-09-10T23:56:00","modified_gmt":"2025-09-11T05:56:00","slug":"cve-2025-47169-heap-based-buffer-overflow-vulnerability-in-microsoft-office-word","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-47169-heap-based-buffer-overflow-vulnerability-in-microsoft-office-word\/","title":{"rendered":"<strong>CVE-2025-47169: Heap-based Buffer Overflow Vulnerability in Microsoft Office Word<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A new vulnerability, CVE-2025-47169, has been identified in Microsoft Office Word that is of serious concern to any organization or individual using the software. This vulnerability can allow unauthorized attackers to execute code locally on the victim&#8217;s machine, potentially leading to system compromise or data leakage. Given the pervasive use of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53733-microsoft-office-word-numeric-type-conversion-vulnerability\/\"  data-wpil-monitor-id=\"81624\">Microsoft Word<\/a> across various sectors, the impact of this vulnerability could be widespread if not properly addressed.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-47169<br \/>\nSeverity: High (7.8\/10)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-21432-memory-corruption-vulnerability-resulting-in-potential-system-compromise-or-data-leakage\/\"  data-wpil-monitor-id=\"76475\">System compromise or data<\/a> leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1965956475\" 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: 720px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 22px; font-weight: 600; display: flex; align-items: center; letter-spacing: -0.02em;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 10px;\">\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: 42px; height: 42px;\" \/>\r\n    <\/a>\r\n    Share secrets securely\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 14px; color: #d1d5db;\">\r\n    Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 18px; color: #a1a1aa;\">\r\n    Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 24px; color: #e4e4e7;\">\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Encrypted identity<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Private Spaces for organizations and teams<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 End-to-end encrypted chat, calls, files, and notes<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Sensitive AI work and protected collaboration<\/li>\r\n    <li>\u2022 Built for information that cannot leak<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px; color: #ffffff;\">\r\n    Our mission is to secure human work alongside AI.\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: 8px; font-weight: 500;\">\r\n      Download Ameeba\r\n    <\/a>\r\n\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 8px; font-weight: 500;\">\r\n      Learn More\r\n    <\/a>\r\n  <\/div>\r\n<\/div><\/div>\n<p>Product | Affected Versions<\/p>\n<p><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=\"73072\">Microsoft Office Word<\/a> | All versions before patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit takes advantage of a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8178-critical-heap-based-buffer-overflow-vulnerability-in-tenda-ac10\/\"  data-wpil-monitor-id=\"69055\">heap-based buffer overflow vulnerability<\/a> in Microsoft Office Word. An attacker sends a specially crafted Word document to the victim. When the victim opens this document, the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7855-critical-stack-based-buffer-overflow-vulnerability-in-tenda-fh451-1-0-0-9\/\"  data-wpil-monitor-id=\"69057\">buffer overflow<\/a> is triggered. This causes data to be written beyond the buffer&#8217;s boundary, leading to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54416-arbitrary-command-execution-vulnerability-in-tj-actions-branch-names-github-action\/\"  data-wpil-monitor-id=\"69858\">arbitrary code execution<\/a> in the context of the current user.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-4175739441\" 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 actual exploit would require a sophisticated understanding of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7795-critical-stack-based-buffer-overflow-vulnerability-in-tenda-fh451\/\"  data-wpil-monitor-id=\"69059\">buffer overflows<\/a> and intricate knowledge of Word&#8217;s internal workings. However, a conceptual version can be represented as follows:<\/p>\n<pre><code class=\"\" data-line=\"\">class BufferOverflow:\ndef __init__(self, buffer_size):\nself.buffer = [None]*buffer_size\ndef overflow(self, data, index):\nself.buffer[index] = data\n# Attacker creates buffer overflow object\nexploit = BufferOverflow(10)\n# Attacker overflows buffer with malicious code\nfor i in range(20):\nexploit.overflow(&quot;malicious code&quot;, i)<\/code><\/pre>\n<p>In this conceptual example, the BufferOverflow class represents a buffer in Word. The attacker is able to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7468-critical-buffer-overflow-vulnerability-in-tenda-fh1201\/\"  data-wpil-monitor-id=\"69061\">overflow the buffer<\/a> by writing more data to it than it can hold.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53770-critical-deserialization-vulnerability-in-microsoft-sharepoint-server\/\"  data-wpil-monitor-id=\"70533\">Microsoft has released a patch to address this vulnerability<\/a>. Users are strongly advised to apply this patch immediately to protect against potential attacks. Until the patch can be applied, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as temporary mitigation. These tools can help to identify and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8059-critical-privilege-escalation-vulnerability-in-b-blocks-wordpress-plugin\/\"  data-wpil-monitor-id=\"76474\">block attempts to exploit the vulnerability<\/a>.<br \/>\nIt&#8217;s essential to remain vigilant and ensure that all software, especially widely-used ones like Microsoft Word, are regularly updated to the most recent <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46198-cross-site-scripting-vulnerability-in-grav-versions-1-7-46-to-1-7-48\/\"  data-wpil-monitor-id=\"69857\">versions to stay protected against such vulnerabilities<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A new vulnerability, CVE-2025-47169, has been identified in Microsoft Office Word that is of serious concern to any organization or individual using the software. This vulnerability can allow unauthorized attackers to execute code locally on the victim&#8217;s machine, potentially leading to system compromise or data leakage. Given the pervasive use of Microsoft Word across [&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":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-62143","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-microsoft","attack_vector-buffer-overflow","attack_vector-rce"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/62143","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=62143"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/62143\/revisions"}],"predecessor-version":[{"id":74067,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/62143\/revisions\/74067"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=62143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=62143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=62143"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=62143"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=62143"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=62143"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=62143"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=62143"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=62143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}