{"id":85554,"date":"2025-11-03T20:54:38","date_gmt":"2025-11-03T20:54:38","guid":{"rendered":""},"modified":"2025-11-11T11:04:04","modified_gmt":"2025-11-11T17:04:04","slug":"cve-2025-54898-critical-out-of-bounds-read-vulnerability-in-microsoft-office-excel","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-54898-critical-out-of-bounds-read-vulnerability-in-microsoft-office-excel\/","title":{"rendered":"<strong>CVE-2025-54898: Critical Out-of-Bounds Read Vulnerability in Microsoft Office Excel<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>This report addresses the critical vulnerability, CVE-2025-54898, a serious out-of-bounds read flaw found in Microsoft Office Excel. This vulnerability, if exploited, could allow an unauthorized attacker to execute arbitrary code on the target system. Considering the wide usage of Microsoft Office Excel across various sectors, such a vulnerability could have significant implications, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49668-heap-based-buffer-overflow-in-windows-rras-resulting-in-potential-system-compromise\/\"  data-wpil-monitor-id=\"92450\">potentially leading to a compromise of systems<\/a> or leakage of confidential data.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-54898<br \/>\nSeverity: High (CVSS: 7.8)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: Potential system compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-139572129\" 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>Microsoft Office Excel | All versions until patched<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47756-out-of-bounds-read-vulnerability-in-v-sft-v6-2-5-0-and-earlier\/\"  data-wpil-monitor-id=\"92347\">vulnerability is an out-of-bounds read<\/a> error within Microsoft Office Excel. This occurs when the application attempts to read data that is outside the intended boundary of a buffer. An attacker could craft a malicious Excel file that, when opened by the user, exploits this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48824-buffer-overflow-vulnerability-in-windows-rras-enables-remote-code-execution\/\"  data-wpil-monitor-id=\"92370\">vulnerability to execute arbitrary code<\/a>. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-2945-critical-remote-code-execution-vulnerability-in-pgadmin-4\/\"  data-wpil-monitor-id=\"92501\">code execution<\/a> occurs in the context of the current user and could lead to a complete compromise of the affected system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2393938849\" 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>The following is a conceptual example of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52815-php-remote-file-inclusion-vulnerability-in-ancorathemes-citygov\/\"  data-wpil-monitor-id=\"92348\">vulnerability might be exploited via a malicious Excel file:<\/a><\/p>\n<pre><code class=\"\" data-line=\"\">POST \/upload_file HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/vnd.ms-excel\n{ &quot;file&quot;: &quot;&lt;base64_encoded_malicious_excel_file&gt;&quot; }<\/code><\/pre>\n<p>Please note that this is a simplified example and the actual exploit would involve crafting a specific Excel file to trigger the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47754-critical-out-of-bounds-read-vulnerability-in-v-sft\/\"  data-wpil-monitor-id=\"92349\">out-of-bounds read<\/a>.<\/p>\n<p><strong>Recommendations<\/strong><\/p>\n<p>To mitigate this vulnerability, users are advised to apply the latest vendor patch provided by Microsoft. In the absence of a patch, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) could serve as temporary mitigation methods. However, these are not foolproof and can only serve to detect or prevent known exploitation techniques. Therefore, the application of the vendor patch remains the most effective mitigation strategy.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview This report addresses the critical vulnerability, CVE-2025-54898, a serious out-of-bounds read flaw found in Microsoft Office Excel. This vulnerability, if exploited, could allow an unauthorized attacker to execute arbitrary code on the target system. Considering the wide usage of Microsoft Office Excel across various sectors, such a vulnerability could have significant implications, potentially leading [&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-85554","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\/85554","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=85554"}],"version-history":[{"count":6,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/85554\/revisions"}],"predecessor-version":[{"id":85786,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/85554\/revisions\/85786"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=85554"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=85554"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=85554"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=85554"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=85554"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=85554"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=85554"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=85554"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=85554"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}