{"id":53961,"date":"2025-06-21T21:11:04","date_gmt":"2025-06-21T21:11:04","guid":{"rendered":""},"modified":"2025-07-08T17:26:32","modified_gmt":"2025-07-08T23:26:32","slug":"cve-2025-36631-critical-file-overwrite-vulnerability-in-tenable-agent","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-36631-critical-file-overwrite-vulnerability-in-tenable-agent\/","title":{"rendered":"<strong>CVE-2025-36631: Critical File Overwrite Vulnerability in Tenable Agent<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The world of cybersecurity is an ever-evolving landscape, with new vulnerabilities being discovered regularly. Most recently, a critical vulnerability identified as CVE-2025-36631 has been identified in Tenable Agent versions prior to 10.8.5. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-24770-critical-php-local-file-inclusion-vulnerability-in-bzotheme-craftxtore\/\"  data-wpil-monitor-id=\"60240\">vulnerability allows non-administrative users to overwrite arbitrary local system files<\/a> with log content at SYSTEM privilege on a Windows host. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5901-buffer-overflow-vulnerability-in-totolink-t10-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"60528\">vulnerability is significant as it can lead to potential system<\/a> compromise or data leakage, putting sensitive data at risk.<br \/>\nIn this blog post, we delve into the details of this vulnerability, its potential impacts, and the steps that system administrators and cybersecurity professionals can take to mitigate its effects. Understanding the nature of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28888-critical-php-remote-file-inclusion-vulnerability-in-bzotheme-giftxtore\/\"  data-wpil-monitor-id=\"60253\">vulnerability is critical<\/a>, especially for organizations using affected versions of Tenable Agent.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-36631<br \/>\nSeverity: Critical (8.4)<br \/>\nAttack Vector: Local<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-40912-critical-vulnerability-in-cryptx-for-perl-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"60785\">System compromise and potential<\/a> data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1738378823\" 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-2025-36633-critical-privilege-escalation-vulnerability-in-tenable-agent-on-windows\/\"  data-wpil-monitor-id=\"61639\">Tenable Agent<\/a> | Versions prior to 10.8.5<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28944-php-remote-file-inclusion-vulnerability-in-snstheme-avaz\/\"  data-wpil-monitor-id=\"60252\">vulnerability works by exploiting the Tenable<\/a> Agent&#8217;s improper handling of file permissions. Specifically, an unprivileged user can manipulate the logging feature of the Tenable Agent to overwrite any <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-39475-path-traversal-vulnerability-leading-to-php-local-file-inclusion-in-frenify-arlo\/\"  data-wpil-monitor-id=\"62034\">local system files<\/a>. This is done by redirecting the output of the log files to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32977-unauthenticated-backup-file-upload-vulnerability-in-quest-kace-systems-management-appliance\/\"  data-wpil-monitor-id=\"64425\">system<\/a> files, effectively granting the attacker SYSTEM level privileges.<br \/>\nThis vulnerability can be <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5353-local-authenticated-attacker-exploit-in-ivanti-workspace-control\/\"  data-wpil-monitor-id=\"60913\">exploited by a local attacker<\/a> who has access to the system and can log in as a non-administrative user. Once the attacker gains SYSTEM privileges, they can perform various malicious activities, including modifying system configurations, installing malicious software, or even exfiltrating <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49653-exposure-of-sensitive-data-in-lablup-s-backendai\/\"  data-wpil-monitor-id=\"64071\">sensitive data<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3138607591\" 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 this vulnerability might be exploited. It demonstrates how an attacker could use a simple command-line instruction to redirect the output of the Tenable Agent logs to overwrite a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29970-microsoft-brokering-file-system-privilege-escalation-vulnerability\/\"  data-wpil-monitor-id=\"65062\">system file<\/a>.<\/p>\n<pre><code class=\"\" data-line=\"\"># Overwrite a system file with Tenable Agent log content\necho &quot;C:\\\\Path\\\\To\\\\TenableAgentLogs&quot; &gt; &quot;C:\\\\Windows\\\\System32\\\\targetfile.dll&quot;<\/code><\/pre>\n<p>Please note: This is a simplified conceptual example and actual exploitation may require more complex steps or specific conditions. Always adhere to ethical guidelines when exploring such <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49136-critical-vulnerability-in-listmonk-allows-unauthorized-access-to-sensitive-environment-variables\/\"  data-wpil-monitor-id=\"60353\">vulnerabilities in a controlled environment<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The world of cybersecurity is an ever-evolving landscape, with new vulnerabilities being discovered regularly. Most recently, a critical vulnerability identified as CVE-2025-36631 has been identified in Tenable Agent versions prior to 10.8.5. This vulnerability allows non-administrative users to overwrite arbitrary local system files with log content at SYSTEM privilege on a Windows host. This [&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-53961","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\/53961","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=53961"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53961\/revisions"}],"predecessor-version":[{"id":58513,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53961\/revisions\/58513"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=53961"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=53961"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=53961"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=53961"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=53961"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=53961"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=53961"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=53961"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=53961"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}