{"id":53959,"date":"2025-06-21T19:10:25","date_gmt":"2025-06-21T19:10:25","guid":{"rendered":""},"modified":"2025-08-31T13:06:12","modified_gmt":"2025-08-31T19:06:12","slug":"cve-2025-47957-critical-use-after-free-vulnerability-in-microsoft-office-word","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-47957-critical-use-after-free-vulnerability-in-microsoft-office-word\/","title":{"rendered":"<strong>CVE-2025-47957: Critical Use-After-Free Vulnerability in Microsoft Office Word<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-47957 represents a significant vulnerability in Microsoft Office Word, a widely-used software application across organizations of all sizes globally. This vulnerability is categorized as a Use-After-Free flaw, which if exploited, permits an unauthorized attacker to execute code locally on the victim&#8217;s machine. Given the ubiquity of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47172-sql-injection-vulnerability-in-microsoft-office-sharepoint\/\"  data-wpil-monitor-id=\"61103\">Microsoft Office<\/a> Word, this vulnerability holds the potential to impact a vast number of systems, warranting immediate attention and mitigation from all users and administrators.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-47957<br \/>\nSeverity: Critical (CVSS Severity Score: 8.4)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5868-critical-vulnerability-in-rt-thread-leading-to-system-compromise-and-data-leakage\/\"  data-wpil-monitor-id=\"63888\">System Compromise<\/a>, Data Leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1166915391\" 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-2025-47167-microsoft-office-type-confusion-vulnerability-leading-to-unauthorized-local-code-execution\/\"  data-wpil-monitor-id=\"61758\">Microsoft Office<\/a> Word | All versions prior to the vendor patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit works by leveraging a Use-After-Free <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47166-critical-deserialization-vulnerability-in-microsoft-office-sharepoint\/\"  data-wpil-monitor-id=\"61080\">vulnerability present in Microsoft Office<\/a> Word. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48816-integer-overflow-vulnerability-in-hid-class-driver-leading-to-local-privilege-escalation\/\"  data-wpil-monitor-id=\"76727\">class of vulnerability<\/a> arises when a program continues to use a pointer after it has been freed. An attacker can manipulate this flaw by crafting a malicious document that, when opened in Word, triggers the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-24770-critical-php-local-file-inclusion-vulnerability-in-bzotheme-craftxtore\/\"  data-wpil-monitor-id=\"60241\">vulnerability and allows the attacker to execute code locally<\/a> on the victim&#8217;s machine.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-499931719\" 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>While the exact <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5353-local-authenticated-attacker-exploit-in-ivanti-workspace-control\/\"  data-wpil-monitor-id=\"60931\">exploit code would be specific to the attacker<\/a>, a conceptual example of how this vulnerability might be exploited could look like this:<\/p>\n<pre><code class=\"\" data-line=\"\">#include &lt;windows.h&gt;\n\/\/ The malicious payload\nvoid payload() {\n\/\/...\n}\n\/\/ The function to trigger the use-after-free vulnerability\nvoid trigger_vulnerability() {\nchar* ptr = (char*) malloc(100);\nstrcpy(ptr, &quot;sensitive data&quot;);\nfree(ptr);\n\/\/ Use after free\nstrcpy(ptr, payload);\n}\nint main() {\ntrigger_vulnerability();\nreturn 0;\n}<\/code><\/pre>\n<p>In this simplified conceptual example, the `trigger_vulnerability` function first <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46713-buffer-overflow-vulnerability-in-sandboxie-s-memory-allocation-subsystem\/\"  data-wpil-monitor-id=\"68576\">allocates memory<\/a> (`ptr`), then frees it, and finally attempts to use it again to store the malicious payload. This results in undefined behavior, which an attacker can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5491-acer-controlcenter-remote-code-execution-vulnerability-potential-system-compromise\/\"  data-wpil-monitor-id=\"61247\">potentially leverage to execute<\/a> their malicious payload.<\/p>\n<p><strong>Mitigation and Remediation<\/strong><\/p>\n<p>The primary mitigation strategy for CVE-2025-47957 is to apply the vendor-provided patch. <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47162-high-risk-buffer-overflow-vulnerability-in-microsoft-office\/\"  data-wpil-monitor-id=\"61748\">Microsoft has released a patch that resolves this vulnerability<\/a>, and it is strongly recommended that all users and system administrators download and install this patch as soon as possible.<br \/>\nIn instances where patching is not immediately feasible, temporary mitigation can be achieved through the use of Web Application Firewalls (WAFs) or Intrusion Detection Systems (IDS). These tools can help <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45984-critical-command-injection-vulnerability-detected-in-blink-routers\/\"  data-wpil-monitor-id=\"61362\">detect and block attempts to exploit this vulnerability<\/a>, providing a layer of protection while a more permanent solution is implemented.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-47957 represents a significant vulnerability in Microsoft Office Word, a widely-used software application across organizations of all sizes globally. This vulnerability is categorized as a Use-After-Free flaw, which if exploited, permits an unauthorized attacker to execute code locally on the victim&#8217;s machine. Given the ubiquity of Microsoft Office Word, this vulnerability holds the potential [&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-53959","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\/53959","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=53959"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53959\/revisions"}],"predecessor-version":[{"id":69151,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53959\/revisions\/69151"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=53959"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=53959"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=53959"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=53959"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=53959"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=53959"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=53959"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=53959"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=53959"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}