{"id":64123,"date":"2025-08-17T15:40:07","date_gmt":"2025-08-17T15:40:07","guid":{"rendered":""},"modified":"2025-10-03T12:33:03","modified_gmt":"2025-10-03T18:33:03","slug":"cve-2025-47991-critical-privilege-escalation-vulnerability-in-microsoft-ime","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-47991-critical-privilege-escalation-vulnerability-in-microsoft-ime\/","title":{"rendered":"<strong>CVE-2025-47991: Critical Privilege Escalation Vulnerability in Microsoft IME<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-47991 is a significant cybersecurity vulnerability related to the use-after-free issue in Microsoft&#8217;s Input Method Editor (IME). This flaw allows an authorized attacker to escalate privileges locally, which could potentially compromise the system or result in data leakage. Given the broad usage of Microsoft&#8217;s software in businesses and personal computing worldwide, this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54689-high-risk-php-remote-file-inclusion-vulnerability-in-urna\/\"  data-wpil-monitor-id=\"76634\">vulnerability poses a significant risk<\/a> to a vast number of users. It is crucial for <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-44955-critical-vulnerability-in-ruckus-network-director-allows-jail-users-to-gain-root-access\/\"  data-wpil-monitor-id=\"75994\">users and administrators to understand this vulnerability<\/a> and take necessary steps to mitigate the risk.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-47991<br \/>\nSeverity: High (7.8 CVSS Score)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<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=\"75995\">System compromise or data<\/a> leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-930080420\" 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 IME | All <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55010-arbitrary-php-object-instantiation-in-kanboard-prior-to-version-1-2-47\/\"  data-wpil-monitor-id=\"77940\">versions prior<\/a> 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-2025-43275-critical-race-condition-vulnerability-in-macos\/\"  data-wpil-monitor-id=\"71633\">vulnerability stems from a use-after-free condition<\/a> within the Microsoft IME. In simple terms, the software incorrectly manages memory allocations, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55157-vim-text-editor-use-after-free-vulnerability-resulting-in-memory-corruption\/\"  data-wpil-monitor-id=\"74985\">resulting in the possibility that an attacker could reference memory<\/a> after it has been freed. This can lead to unexpected behaviors such as the system crashing or, in certain circumstances, the execution 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=\"73106\">unauthorized code<\/a>. An attacker who successfully exploits this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30327-integer-overflow-vulnerability-in-incopy-leading-to-potential-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"73670\">vulnerability can run arbitrary code<\/a> in the context of the current user. If the current user is logged on with administrative user rights, an attacker could then install programs; view, change, or delete data; or create new <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54122-unauthenticated-full-read-ssrf-vulnerability-in-manager-io-manager-accounting-software\/\"  data-wpil-monitor-id=\"72675\">accounts with full<\/a> user rights.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3729495786\" 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 exploit code is not provided due to ethical concerns, the exploitation <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27052-memory-corruption-vulnerability-in-unix-clients-processing-data-packets\/\"  data-wpil-monitor-id=\"74109\">process would conceptually involve the misuse of the memory<\/a> allocation and deallocation within the application, similar to the following pseudocode:<\/p>\n<pre><code class=\"\" data-line=\"\">allocate_memory(object)\nuse_object(object)\nfree_memory(object)\nuse_object(object) \/\/ Use after free vulnerability<\/code><\/pre>\n<p>In the above pseudocode, the object is used even after its associated memory has been freed, resulting in undefined behavior, which could be manipulated by an attacker to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50754-stored-cross-site-scripting-xss-vulnerability-leading-to-remote-code-execution-in-unisite-cms-5-0\/\"  data-wpil-monitor-id=\"74675\">execute malicious code<\/a>.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>The most effective way to mitigate this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53762-privilege-elevation-vulnerability-in-microsoft-purview\/\"  data-wpil-monitor-id=\"72895\">vulnerability is to apply the patches provided by Microsoft<\/a>. If a patch cannot be applied immediately, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) could serve as a temporary mitigation. However, these measures may not fully prevent an exploit and are not a substitute for patching the system. Regular patch management, combined with robust <a href=\"https:\/\/www.ameeba.com\/blog\/introducing-the-ameeba-cybersecurity-group-chat\/\"  data-wpil-monitor-id=\"88498\">cybersecurity<\/a> practices, are crucial to maintaining a secure IT environment.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-47991 is a significant cybersecurity vulnerability related to the use-after-free issue in Microsoft&#8217;s Input Method Editor (IME). This flaw allows an authorized attacker to escalate privileges locally, which could potentially compromise the system or result in data leakage. Given the broad usage of Microsoft&#8217;s software in businesses and personal computing worldwide, this vulnerability poses [&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":[76],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-64123","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-microsoft","attack_vector-privilege-escalation"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64123","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=64123"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64123\/revisions"}],"predecessor-version":[{"id":81304,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64123\/revisions\/81304"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=64123"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=64123"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=64123"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=64123"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=64123"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=64123"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=64123"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=64123"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=64123"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}