{"id":62146,"date":"2025-08-08T11:26:11","date_gmt":"2025-08-08T11:26:11","guid":{"rendered":""},"modified":"2025-10-03T12:32:53","modified_gmt":"2025-10-03T18:32:53","slug":"cve-2025-47173-microsoft-office-input-validation-vulnerability-leading-to-local-code-execution","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-47173-microsoft-office-input-validation-vulnerability-leading-to-local-code-execution\/","title":{"rendered":"<strong>CVE-2025-47173: Microsoft Office Input Validation Vulnerability Leading to Local Code Execution<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In this post, we&#8217;re exploring a significant cybersecurity vulnerability identified as CVE-2025-47173. This vulnerability lies within Microsoft Office, a suite of productivity applications used by millions of individuals and businesses worldwide. This flaw stems from improper input validation, allowing an attacker to execute <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43233-critical-https-proxy-vulnerability-allowing-sensitive-data-access\/\"  data-wpil-monitor-id=\"69363\">code locally<\/a> and potentially compromise the system or cause data leakage. Such <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2015-10143-unauthorized-modification-vulnerability-in-wordpress-platform-theme\/\"  data-wpil-monitor-id=\"69004\">vulnerabilities are severe as they can lead to unauthorized<\/a> access and manipulation of sensitive data, hence why it matters to both individual users and organizations alike.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-47173<br \/>\nSeverity: High (7.8 CVSS Score)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <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=\"69662\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-264187685\" 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=\"73062\">Microsoft Office<\/a> | All versions before the latest patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50738-memos-application-vulnerability-allows-for-unauthorized-user-information-disclosure\/\"  data-wpil-monitor-id=\"69660\">vulnerability lies in the way Microsoft Office validates user<\/a> input. An <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-42959-unauthenticated-replay-attack-exploiting-hmac-reuse\/\"  data-wpil-monitor-id=\"71313\">attacker can exploit<\/a> this by crafting malicious input that is not properly sanitized by the application. This could be in the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52478-stored-cross-site-scripting-vulnerability-in-n8n-s-form-trigger-node\/\"  data-wpil-monitor-id=\"79433\">form of a document or a script<\/a> embedded within a document. When this document is opened by a victim, the embedded <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50460-remote-code-execution-vulnerability-in-ms-swift-project\/\"  data-wpil-monitor-id=\"71430\">code is executed<\/a> locally. This could lead to actions ranging from unauthorized <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50060-critical-data-access-vulnerability-in-oracle-bi-publisher\/\"  data-wpil-monitor-id=\"70152\">data access<\/a> to complete control over the system depending on the user&#8217;s privileges.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-732247552\" 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>Below is a conceptual example of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47170-use-after-free-vulnerability-in-microsoft-office-word\/\"  data-wpil-monitor-id=\"75405\">vulnerability<\/a> might be exploited using a macro embedded in an Office document:<\/p>\n<pre><code class=\"\" data-line=\"\">Sub Auto_Open()\nDim cmd As String\ncmd = &quot;Shell(&quot;&quot;cmd.exe \/c echo This is a test &gt; C:\\test.txt&quot;&quot;, vbNormalFocus)&quot;\nCall VBA.Interaction.CallByName(Application, cmd, VBA.CallType.Method)\nEnd Sub<\/code><\/pre>\n<p>This example showcases an Office macro that, when opened, will <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46122-arbitrary-command-execution-vulnerability-in-commscope-ruckus-unleashed\/\"  data-wpil-monitor-id=\"78930\">execute a command<\/a> using the Windows command prompt. This is a benign example, writing &#8220;This is a test&#8221; to a text file in the root of the C drive, but it demonstrates how an attacker could <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=\"69661\">execute arbitrary commands<\/a>.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>Users are advised to apply the vendor-provided patch immediately to mitigate this vulnerability. In the absence of a patch, the use of Web Application Firewalls (WAFs) or Intrusion Detection Systems (IDS) can provide temporary mitigation. These <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=\"70248\">systems can detect and block attempts to exploit known vulnerabilities<\/a>, providing an added layer of security. However, these are not foolproof, and applying the vendor patch remains the most effective solution.<br \/>\nIt is also recommended to be cautious when <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-58158-harness-open-source-git-lfs-server-vulnerability\/\"  data-wpil-monitor-id=\"85516\">opening Office documents from unknown sources<\/a> and to disable macros where possible, as these are commonly used as an attack vector. It&#8217;s important to keep your software updated and follow best practices for <a href=\"https:\/\/www.ameeba.com\/blog\/introducing-the-ameeba-cybersecurity-group-chat\/\"  data-wpil-monitor-id=\"88476\">cybersecurity<\/a> to reduce your risk of exploitation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In this post, we&#8217;re exploring a significant cybersecurity vulnerability identified as CVE-2025-47173. This vulnerability lies within Microsoft Office, a suite of productivity applications used by millions of individuals and businesses worldwide. This flaw stems from improper input validation, allowing an attacker to execute code locally and potentially compromise the system or cause data leakage. [&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-62146","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\/62146","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=62146"}],"version-history":[{"count":13,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/62146\/revisions"}],"predecessor-version":[{"id":81283,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/62146\/revisions\/81283"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=62146"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=62146"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=62146"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=62146"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=62146"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=62146"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=62146"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=62146"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=62146"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}