{"id":85602,"date":"2025-11-04T05:55:39","date_gmt":"2025-11-04T05:55:39","guid":{"rendered":""},"modified":"2025-11-11T11:04:00","modified_gmt":"2025-11-11T17:04:00","slug":"cve-2025-54902-unauthorized-code-execution-vulnerability-in-microsoft-office-excel","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-54902-unauthorized-code-execution-vulnerability-in-microsoft-office-excel\/","title":{"rendered":"<strong>CVE-2025-54902: Unauthorized Code Execution Vulnerability in Microsoft Office Excel<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The CVE-2025-54902 vulnerability is a dangerous flaw found in Microsoft Office Excel. It allows an unauthorized attacker to execute code locally through an out-of-bounds read. This vulnerability can lead to <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=\"92449\">potential system<\/a> compromise or data leakage, making it a significant threat to any organization using the affected versions of Microsoft Office Excel.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-54902<br \/>\nSeverity: High (7.8 CVSS)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: Potential system compromise and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-102071405\" 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 before the latest patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit works by taking advantage of an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47755-out-of-bounds-read-vulnerability-in-v-sft-v6-2-5-0-and-earlier\/\"  data-wpil-monitor-id=\"92412\">out-of-bounds read<\/a> error in Microsoft Office Excel. The attacker sends a specially crafted file to the victim, who opens it using the vulnerable Excel software. This allows the attacker to read data they&#8217;re not supposed to have access to or <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-2945-critical-remote-code-execution-vulnerability-in-pgadmin-4\/\"  data-wpil-monitor-id=\"92491\">execute arbitrary code<\/a> on the victim&#8217;s system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3010161407\" 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<br \/>\n<strong>conceptual<\/strong><br \/>\n example of how this vulnerability might be exploited. The attacker would craft a malicious Excel file with an embedded payload designed to trigger the out-of-bounds read.<\/p>\n<pre><code class=\"\" data-line=\"\"># Generate malicious Excel file\n$ msfvenom -p windows\/exec CMD=calc.exe -f xls &gt; malicious.xls\n# Send the malicious file to the victim\n$ mail -a malicious.xls -s &quot;Important Document&quot; victim@example.com<\/code><\/pre>\n<p>In this example, the `msfvenom` command is used to generate a malicious Excel file that, when opened, would execute the `calc.exe` program on the victim&#8217;s machine. The malicious file is then sent to the victim via email. When the victim opens the file, the payload is executed, exploiting the vulnerability.<br \/>\nPlease note that this is a hypothetical example and is not meant to encourage malicious activities. It is intended to illustrate how such a vulnerability could be exploited.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The CVE-2025-54902 vulnerability is a dangerous flaw found in Microsoft Office Excel. It allows an unauthorized attacker to execute code locally through an out-of-bounds read. This vulnerability can lead to potential system compromise or data leakage, making it a significant threat to any organization using the affected versions of Microsoft Office Excel. Vulnerability Summary [&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-85602","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\/85602","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=85602"}],"version-history":[{"count":3,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/85602\/revisions"}],"predecessor-version":[{"id":85776,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/85602\/revisions\/85776"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=85602"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=85602"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=85602"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=85602"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=85602"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=85602"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=85602"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=85602"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=85602"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}