{"id":64160,"date":"2025-08-19T04:53:06","date_gmt":"2025-08-19T04:53:06","guid":{"rendered":""},"modified":"2025-09-10T12:13:45","modified_gmt":"2025-09-10T18:13:45","slug":"cve-2025-49694-null-pointer-dereference-vulnerability-in-microsoft-brokering-file-system","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-49694-null-pointer-dereference-vulnerability-in-microsoft-brokering-file-system\/","title":{"rendered":"<strong>CVE-2025-49694: Null Pointer Dereference Vulnerability in Microsoft Brokering File System<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The CVE-2025-49694 is a critical security vulnerability in the Microsoft Brokering File System. This vulnerability allows an authorized attacker to exploit a null pointer dereference, leading to an elevation of privileges on a local level. As a cybersecurity issue, it poses a serious risk to all users, particularly those operating in enterprise environments where sensitive <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43220-unprecedented-data-access-vulnerability-in-multiple-macos-and-ipados-versions\/\"  data-wpil-monitor-id=\"73228\">data might be accessible<\/a>. This vulnerability, if left unpatched, could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30327-integer-overflow-vulnerability-in-incopy-leading-to-potential-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"73678\">lead to potential<\/a> system compromise or data leakage, which underscores the importance of immediate action and mitigation.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-49694<br \/>\nSeverity: High (CVSS: 7.8)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53762-privilege-elevation-vulnerability-in-microsoft-purview\/\"  data-wpil-monitor-id=\"72916\">Elevation of privileges<\/a>, potential system compromise, or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-739825910\" 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-2025-49693-a-deep-dive-into-double-free-vulnerability-in-microsoft-brokering-file-system\/\"  data-wpil-monitor-id=\"75308\">Microsoft Brokering File<\/a> System | All current versions<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit works by an authenticated attacker sending a specially crafted file to a <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=\"73103\">vulnerable version of the Microsoft<\/a> Brokering File System. This file triggers a null pointer dereference that can be leveraged by the attacker to execute arbitrary code with <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47962-unauthorized-privilege-elevation-in-windows-sdk\/\"  data-wpil-monitor-id=\"74055\">elevated privileges<\/a> on the affected system, potentially leading to a full system compromise or data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3925764492\" 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 vulnerability might be exploited. Note that this is pseudocode and it&#8217;s only intended to demonstrate the exploit conceptually:<\/p>\n<pre><code class=\"\" data-line=\"\">#!\/usr\/bin\/env python\nimport requests\nimport json\n# Prepare the malicious payload\nmalicious_payload = {\n&quot;file&quot;: {\n&quot;name&quot;: &quot;exploit.txt&quot;,\n&quot;content&quot;: &quot;NULL_POINTER_DEREFERENCE_TRIGGER&quot;\n}\n}\n# Send the malicious payload to the vulnerable system\nresponse = requests.post(\n&quot;http:\/\/target.example.com\/vulnerable\/endpoint&quot;,\nheaders={&quot;Content-Type&quot;: &quot;application\/json&quot;},\ndata=json.dumps(malicious_payload)\n)\n# Check the response\nif response.status_code == 200:\nprint(&quot;Exploit successful!&quot;)\nelse:\nprint(&quot;Exploit failed.&quot;)<\/code><\/pre>\n<p>The above code demonstrates how an attacker might craft and send a malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6204-code-injection-vulnerability-in-delmia-apriso\/\"  data-wpil-monitor-id=\"73994\">file<\/a> to the vulnerable endpoint. If the exploit is successful, the attacker would be able to execute <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32451-memory-corruption-vulnerability-in-foxit-reader-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"74430\">arbitrary code<\/a> with elevated privileges on the target system.<br \/>\nIn <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5391-arbitrary-file-deletion-vulnerability-in-woocommerce-purchase-orders-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"81299\">order to mitigate this vulnerability<\/a>, it is advised to apply the vendor&#8217;s security patch as soon as possible or use a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) as a temporary measure.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The CVE-2025-49694 is a critical security vulnerability in the Microsoft Brokering File System. This vulnerability allows an authorized attacker to exploit a null pointer dereference, leading to an elevation of privileges on a local level. As a cybersecurity issue, it poses a serious risk to all users, particularly those operating in enterprise environments where [&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-64160","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\/64160","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=64160"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64160\/revisions"}],"predecessor-version":[{"id":73748,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64160\/revisions\/73748"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=64160"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=64160"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=64160"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=64160"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=64160"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=64160"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=64160"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=64160"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=64160"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}