{"id":58376,"date":"2025-07-08T11:01:11","date_gmt":"2025-07-08T11:01:11","guid":{"rendered":""},"modified":"2025-08-09T12:55:05","modified_gmt":"2025-08-09T18:55:05","slug":"cve-2025-30379-release-of-invalid-pointer-in-microsoft-office-excel-leading-to-local-code-execution","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-30379-release-of-invalid-pointer-in-microsoft-office-excel-leading-to-local-code-execution\/","title":{"rendered":"<strong>CVE-2025-30379: Release of Invalid Pointer in Microsoft Office Excel Leading to Local Code Execution<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The vulnerability under discussion, CVE-2025-30379, is a serious flaw found in Microsoft Office Excel that allows an unauthorized attacker to execute code locally. This vulnerability affects any user who utilizes Microsoft Office Excel, a widely used spreadsheet software. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32281-high-severity-missing-authorization-vulnerability-in-focuxtheme-wpkit-for-elementor\/\"  data-wpil-monitor-id=\"65313\">severity of this vulnerability<\/a> is high, not only because of its potential for system compromise and data leakage, but also due to the ubiquitous use of the affected software, making a vast number of systems worldwide potential targets.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-30379<br \/>\nSeverity: High (CVSS Score 7.8)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52817-authorization-bypass-in-zealousweb-abandoned-contact-form-7-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"65725\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3490736521\" 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><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29977-use-after-free-vulnerability-in-microsoft-office-excel\/\"  data-wpil-monitor-id=\"64984\">Microsoft Office<\/a> Excel | All versions prior to the patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30419-memory-corruption-vulnerability-in-ni-circuit-design-suite\/\"  data-wpil-monitor-id=\"68189\">vulnerability lies in the improper handling of memory<\/a> objects by Microsoft Office Excel. When a specially crafted Excel file is opened, it triggers the release of an invalid pointer or reference. This can lead to undefined behavior, such as <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30417-memory-corruption-vulnerability-in-ni-circuit-design-suite\/\"  data-wpil-monitor-id=\"68208\">memory corruption<\/a> or application crashes. However, a skilled attacker can manipulate this undefined behavior to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29331-critical-remote-code-execution-vulnerability-in-mhsanaei-3x-ui\/\"  data-wpil-monitor-id=\"64974\">execute arbitrary code<\/a> in the context of the current user.<br \/>\nIf the current <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4334-critical-privilege-escalation-vulnerability-in-simple-user-registration-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"64956\">user is logged in with administrative privileges<\/a>, the attacker can take control of the affected system. This could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52717-sql-injection-vulnerability-in-lifterlms-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"65393\">potentially lead to system<\/a> compromise, allowing the attacker to install programs, view, change, or delete data, or create new accounts with full user rights.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-401560038\" 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>In this conceptual example, an attacker might embed malicious code in an Excel <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30131-unauthenticated-file-upload-vulnerability-in-iroad-dashcam-fx2-devices\/\"  data-wpil-monitor-id=\"64964\">file that triggers the vulnerability<\/a> when the file is opened. The code might look something like this:<\/p>\n<pre><code class=\"\" data-line=\"\">Sub Workbook_Open()\nDim buffer As String\nbuffer = Space(4096) &#039; Create a large string.\nRange(&quot;A1&quot;).Value = buffer &#039; Release the invalid pointer.\nShell &quot;cmd.exe \/c &quot; &amp; &quot;malicious_command&quot; &#039; Execute arbitrary code.\nEnd Sub<\/code><\/pre>\n<p>This VBA (Visual Basic for Applications) code creates a large string that triggers the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30420-memory-corruption-vulnerability-in-ni-circuit-design-suite\/\"  data-wpil-monitor-id=\"71074\">memory corruption<\/a> when assigned to a cell (&#8220;A1&#8221;). The Shell function then <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=\"71075\">executes arbitrary<\/a> command-line instructions within the context of the current user.<br \/>\nPlease note that this is a simplified and conceptual example. Actual exploits might involve more complex and obfuscated code.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The vulnerability under discussion, CVE-2025-30379, is a serious flaw found in Microsoft Office Excel that allows an unauthorized attacker to execute code locally. This vulnerability affects any user who utilizes Microsoft Office Excel, a widely used spreadsheet software. The severity of this vulnerability is high, not only because of its potential for system compromise [&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-58376","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\/58376","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=58376"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58376\/revisions"}],"predecessor-version":[{"id":63610,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/58376\/revisions\/63610"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=58376"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=58376"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=58376"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=58376"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=58376"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=58376"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=58376"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=58376"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=58376"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}