{"id":42966,"date":"2025-05-23T05:15:04","date_gmt":"2025-05-23T05:15:04","guid":{"rendered":""},"modified":"2025-06-11T05:19:51","modified_gmt":"2025-06-11T11:19:51","slug":"cve-2025-4733-critical-buffer-overflow-vulnerability-in-totolink-routers","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4733-critical-buffer-overflow-vulnerability-in-totolink-routers\/","title":{"rendered":"<strong>CVE-2025-4733: Critical Buffer Overflow Vulnerability in TOTOLINK Routers<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical security vulnerability, identified as CVE-2025-4733, has been discovered in TOTOLINK\u2019s A3002R and A3002RU 3.0.0-B20230809.1615 routers. This vulnerability has potential for system compromise and data leakage, posing a significant risk to any individual or organization using the affected products. Given the widespread usage of these routers, the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4984-stored-cross-site-scripting-vulnerability-in-city-discover-referential-manager\/\"  data-wpil-monitor-id=\"57297\">discovered vulnerability<\/a> is of high concern and immediate attention is recommended.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-4733<br \/>\nSeverity: Critical (CVSS 8.8)<br \/>\nAttack Vector: Remote<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <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=\"49319\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2403541073\" 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-2025-45863-buffer-overflow-vulnerability-in-totolink-a3002r-routers\/\"  data-wpil-monitor-id=\"48889\">TOTOLINK A3002R<\/a> | 3.0.0-B20230809.1615<br \/>\n<a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4825-critical-buffer-overflow-vulnerability-in-totolink-a702r-a3002r-and-a3002ru-routers\/\"  data-wpil-monitor-id=\"51246\">TOTOLINK A3002RU<\/a> | 3.0.0-B20230809.1615<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47708-cross-site-request-forgery-vulnerability-in-drupal-enterprise-mfa-tfa\/\"  data-wpil-monitor-id=\"49787\">vulnerability resides in the HTTP POST Request<\/a> Handler of the \/boafrm\/formIpQoS file. The flaw is triggered when an attacker manipulates the &#8216;mac&#8217; argument in the HTTP POST request, leading to a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32756-critical-buffer-overflow-vulnerability-in-multiple-fortinet-products\/\"  data-wpil-monitor-id=\"48387\">buffer overflow<\/a>. This overflow can potentially allow the attacker to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-26389-arbitrary-code-execution-vulnerability-in-ozw672-and-ozw772\/\"  data-wpil-monitor-id=\"48478\">execute arbitrary code<\/a> on the targeted system, leading to system compromise or data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3625845030\" 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. An attacker sends a maliciously crafted <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4827-critical-buffer-overflow-vulnerability-in-totolink-http-post-request-handler\/\"  data-wpil-monitor-id=\"50915\">HTTP POST request<\/a> to the router:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/boafrm\/formIpQoS HTTP\/1.1\nHost: target-router-ip\nContent-Type: application\/x-www-form-urlencoded\nmac=00:00:00:00:00:00%00...[additional characters to overflow the buffer]<\/code><\/pre>\n<p>In this example, the &#8216;mac&#8217; argument is filled with an excessive number of characters, causing a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29840-critical-stack-based-buffer-overflow-vulnerability-in-windows-media\/\"  data-wpil-monitor-id=\"48488\">buffer overflow<\/a> in the router&#8217;s memory.<\/p>\n<p><strong>Mitigation Recommendations<\/strong><\/p>\n<p>While the best course of action is to apply a vendor-supplied patch, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation. These solutions can potentially detect and block the malicious HTTP POST <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47701-cross-site-request-forgery-vulnerability-in-drupal-restrict-route-by-ip\/\"  data-wpil-monitor-id=\"50141\">requests that exploit this vulnerability<\/a>. Users are strongly encouraged to contact their vendor for specific patching instructions and to apply the patch immediately.<br \/>\nIt is also recommended to restrict network <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43000-high-risk-conditional-access-vulnerability-in-promotion-management-wizard\/\"  data-wpil-monitor-id=\"51660\">access to the router&#8217;s management<\/a> interface and ensure that it is not accessible from the public internet. This will reduce the attack surface and the likelihood of a successful exploit.<\/p>\n<p><strong>Conclusion<\/strong><\/p>\n<p>CVE-2025-4733 is a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-26390-critical-sql-injection-vulnerability-in-ozw672-and-ozw772-devices\/\"  data-wpil-monitor-id=\"48239\">critical vulnerability<\/a> that affects TOTOLINK&#8217;s A3002R and A3002RU 3.0.0-B20230809.1615 routers. It&#8217;s imperative for users and administrators of these <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4809-critical-vulnerability-in-tenda-ac7-router-leads-to-system-compromise\/\"  data-wpil-monitor-id=\"50605\">routers to apply the vendor-supplied patch to prevent potential system<\/a> compromise or data leakage. As <a href=\"https:\/\/www.ameeba.com\/blog\/untapped-millions-texas-s-unutilized-funds-in-the-battle-against-cybersecurity-threats-in-schools\/\"  data-wpil-monitor-id=\"48416\">cybersecurity threats<\/a> continue to evolve, it&#8217;s vital to maintain a proactive stance on security and continually monitor systems for potential vulnerabilities.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical security vulnerability, identified as CVE-2025-4733, has been discovered in TOTOLINK\u2019s A3002R and A3002RU 3.0.0-B20230809.1615 routers. This vulnerability has potential for system compromise and data leakage, posing a significant risk to any individual or organization using the affected products. Given the widespread usage of these routers, the discovered vulnerability is of high concern [&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-42966","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\/42966","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=42966"}],"version-history":[{"count":14,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/42966\/revisions"}],"predecessor-version":[{"id":51125,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/42966\/revisions\/51125"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=42966"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=42966"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=42966"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=42966"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=42966"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=42966"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=42966"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=42966"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=42966"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}