{"id":42517,"date":"2025-05-22T12:07:54","date_gmt":"2025-05-22T12:07:54","guid":{"rendered":""},"modified":"2025-07-05T23:19:25","modified_gmt":"2025-07-06T05:19:25","slug":"cve-2025-32704-buffer-over-read-vulnerability-in-microsoft-office-excel","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-32704-buffer-over-read-vulnerability-in-microsoft-office-excel\/","title":{"rendered":"<strong>CVE-2025-32704: Buffer Over-read Vulnerability in Microsoft Office Excel<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The vulnerability CVE-2025-32704 is a critical issue that affects Microsoft Office Excel, a widely used spreadsheet program. This security flaw, classified as a buffer over-read vulnerability, can potentially allow an unauthorized attacker to execute arbitrary code on the victim&#8217;s system. As such, the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30387-severe-path-traversal-vulnerability-in-azure-allowing-privilege-escalation\/\"  data-wpil-monitor-id=\"48731\">severity and potential impact of this vulnerability<\/a> cannot be overstated. A successful attack could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31234-input-sanitization-flaw-leading-to-system-termination-and-kernel-memory-corruption\/\"  data-wpil-monitor-id=\"47880\">lead to system<\/a> compromise or data leakage, posing significant risks to businesses and individuals alike.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-32704<br \/>\nSeverity: Critical, CVSS Score 8.4<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-42977-path-handling-vulnerability-that-risks-data-leakage-and-system-compromise\/\"  data-wpil-monitor-id=\"56972\">System compromise or data leakage<\/a><\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-155264838\" 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-2025-30377-code-execution-vulnerability-in-microsoft-office-via-use-after-free\/\"  data-wpil-monitor-id=\"49925\">Microsoft Office<\/a> Excel | All versions prior to patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit hinges on a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32756-critical-buffer-overflow-vulnerability-in-multiple-fortinet-products\/\"  data-wpil-monitor-id=\"48391\">buffer over-read vulnerability<\/a> in Microsoft Office Excel. Buffer over-read is a type of <a href=\"https:\/\/www.ameeba.com\/blog\/ua-little-rock-cybersecurity-program-paving-the-way-to-a-secure-digital-future\/\"  data-wpil-monitor-id=\"49332\">security flaw that occurs when a program<\/a> reads beyond the boundary of a buffer. This can happen due to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-48257-remote-code-execution-and-data-exposure-vulnerability\/\"  data-wpil-monitor-id=\"47908\">coding errors when manipulating data<\/a> in the buffer. In this case, an attacker could craft a malicious Excel file that, when opened, triggers the buffer over-read, allowing the attacker to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-21325-microsoft-printer-metadata-troubleshooter-tool-remote-code-execution-vulnerability\/\"  data-wpil-monitor-id=\"47725\">execute arbitrary code<\/a> on the victim&#8217;s system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1730607199\" 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>This is a conceptual example of an exploit that could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27891-samsung-mobile-and-wearable-processors-vulnerability-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"49331\">potentially take advantage of the vulnerability<\/a>. It assumes that the attacker has created a malicious Excel <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4981-critical-file-extraction-vulnerability-in-mattermost-leading-to-potential-remote-code-execution\/\"  data-wpil-monitor-id=\"63102\">file with embedded code<\/a>.<\/p>\n<pre><code class=\"\" data-line=\"\"># Attacker crafts malicious Excel file\necho &quot;malicious_code&quot; &gt; exploit.xls\n# Attacker sends file to victim\nscp exploit.xls victim@target:\/tmp\/\n# Victim opens the file in Excel, triggering the exploit\nvictim$ excel \/tmp\/exploit.xls<\/code><\/pre>\n<p>Please note that this is a simplified example for illustrative purposes and the actual attack would likely involve more complex and obfuscated code.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>The best way to mitigate this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49002-critical-vulnerability-in-dataease-bypassing-patch-for-cve-2025-32966\/\"  data-wpil-monitor-id=\"63104\">vulnerability is to apply the vendor-provided patch<\/a> as soon as it becomes available. In the meantime, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5485-a-critical-vulnerability-pertaining-to-user-name-enumeration-in-web-management-interfaces\/\"  data-wpil-monitor-id=\"63103\">users can use a Web<\/a> Application Firewall (WAF) or an Intrusion Detection System (IDS) as temporary mitigation. It is also advisable to be wary of any unsolicited Excel files and to avoid <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2021-41691-sql-injection-vulnerability-in-os4ed-open-source-information-system-community\/\"  data-wpil-monitor-id=\"64181\">opening any from untrusted sources<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The vulnerability CVE-2025-32704 is a critical issue that affects Microsoft Office Excel, a widely used spreadsheet program. This security flaw, classified as a buffer over-read vulnerability, can potentially allow an unauthorized attacker to execute arbitrary code on the victim&#8217;s system. As such, the severity and potential impact of this vulnerability cannot be overstated. A [&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-42517","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\/42517","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=42517"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/42517\/revisions"}],"predecessor-version":[{"id":57703,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/42517\/revisions\/57703"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=42517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=42517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=42517"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=42517"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=42517"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=42517"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=42517"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=42517"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=42517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}