{"id":43199,"date":"2025-05-23T15:19:37","date_gmt":"2025-05-23T15:19:37","guid":{"rendered":""},"modified":"2025-05-24T17:17:35","modified_gmt":"2025-05-24T17:17:35","slug":"cve-2025-4809-critical-vulnerability-in-tenda-ac7-router-leads-to-system-compromise","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4809-critical-vulnerability-in-tenda-ac7-router-leads-to-system-compromise\/","title":{"rendered":"<strong>CVE-2025-4809: Critical Vulnerability in Tenda AC7 Router Leads to System Compromise<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The world of cybersecurity is constantly evolving, and with it comes a steady stream of new vulnerabilities that threaten the security of our devices. One such vulnerability, identified as CVE-2025-4809, is making headlines due to its critical nature and the potential havoc it could wreak if exploited. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45858-critical-command-injection-vulnerability-found-in-totolink-a3002r\/\"  data-wpil-monitor-id=\"48642\">vulnerability has been found<\/a> in the Tenda AC7 15.03.06.44, a popular router model. The vulnerability stems from a function in the router\u2019s firmware, and if exploited, it could lead to a full system compromise or data leakage, posing <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-40566-severe-user-session-vulnerability-in-simatic-pcs-neo-products\/\"  data-wpil-monitor-id=\"48846\">severe risks to the users<\/a>&#8216; privacy and network security.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-4809<br \/>\nSeverity: Critical, CVSS Severity Score 8.8<br \/>\nAttack Vector: Remote<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: Potential system compromise and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2778390342\" 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>Tenda AC7 Router | 15.03.06.44<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29840-critical-stack-based-buffer-overflow-vulnerability-in-windows-media\/\"  data-wpil-monitor-id=\"48493\">critical vulnerability<\/a> lies in the function fromSafeSetMacFilter of the file \/goform\/setMacFilterCfg. The improper handling of the deviceList argument by this function leads to a stack-based buffer overflow. An attacker can manipulate this argument remotely, causing the overflow and potentially allowing the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45857-remote-code-execution-vulnerability-in-edimax-cv7428ns-v1-20\/\"  data-wpil-monitor-id=\"48639\">execution of arbitrary code<\/a>. This could result in complete system compromise or data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-4009425461\" 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>This is a<br \/>\n<strong>conceptual<\/strong><br \/>\n example, illustrating how an attacker might exploit the vulnerability. In this case, the attacker sends a specifically crafted HTTP request causing the stack-based buffer overflow:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/goform\/setMacFilterCfg HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ &quot;deviceList&quot;: &quot;A&quot;*5000 }<\/code><\/pre>\n<p>In the above example, &#8220;A&#8221;*5000 represents a string of 5000 &#8220;A&#8221; characters, which is far more than the buffer can handle, leading to overflow.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>To mitigate this vulnerability, applying the vendor&#8217;s patch is the most effective solution. If the patch is not available or cannot be applied immediately, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as temporary mitigation. These <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27891-samsung-mobile-and-wearable-processors-vulnerability-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"49282\">systems can identify and block attempts to exploit this vulnerability<\/a>, providing an additional layer of protection until the patch can be applied. However, they are not a replacement for timely patching and regular system updates.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The world of cybersecurity is constantly evolving, and with it comes a steady stream of new vulnerabilities that threaten the security of our devices. One such vulnerability, identified as CVE-2025-4809, is making headlines due to its critical nature and the potential havoc it could wreak if exploited. This vulnerability has been found in the [&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":[],"product":[],"attack_vector":[86],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-43199","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/43199","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=43199"}],"version-history":[{"count":5,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/43199\/revisions"}],"predecessor-version":[{"id":43933,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/43199\/revisions\/43933"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=43199"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=43199"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=43199"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=43199"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=43199"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=43199"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=43199"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=43199"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=43199"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}