{"id":43695,"date":"2025-05-24T06:25:48","date_gmt":"2025-05-24T06:25:48","guid":{"rendered":""},"modified":"2025-09-11T05:38:12","modified_gmt":"2025-09-11T11:38:12","slug":"cve-2025-4833-critical-buffer-overflow-vulnerability-in-totolink-routers","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4833-critical-buffer-overflow-vulnerability-in-totolink-routers\/","title":{"rendered":"<strong>CVE-2025-4833: Critical Buffer Overflow Vulnerability in TOTOLINK Routers<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical vulnerability has been discovered in specific TOTOLINK router models, specifically the A702R, A3002R, and A3002RU versions 3.0.0-B20230809.1615. This particular bug allows for remote code execution, potentially leading to a complete system compromise or data leakage. This issue lies in the unknown processing of the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4391-wordpress-echo-rss-feed-post-generator-plugin-arbitrary-file-upload-vulnerability\/\"  data-wpil-monitor-id=\"50871\">file \/boafrm\/formNtp and its HTTP POST<\/a> request handler component. Given the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47577-severe-unrestricted-file-upload-vulnerability-in-ti-woocommerce-wishlist\/\"  data-wpil-monitor-id=\"52116\">severity of this vulnerability<\/a>, it&#8217;s essential for organizations and individuals using the affected models to understand the potential risks and take immediate steps to mitigate them.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-4833<br \/>\nSeverity: Critical (CVSS: 8.8)<br \/>\nAttack Vector: Network<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=\"49301\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3306574692\" 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-2025-4825-critical-buffer-overflow-vulnerability-in-totolink-a702r-a3002r-and-a3002ru-routers\/\"  data-wpil-monitor-id=\"51237\">TOTOLINK A702R<\/a> | 3.0.0-B20230809.1615<br \/>\n<a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4732-critical-buffer-overflow-vulnerability-in-totolink-a3002r-and-a3002ru\/\"  data-wpil-monitor-id=\"50757\">TOTOLINK A3002R<\/a> | 3.0.0-B20230809.1615<br \/>\nTOTOLINK A3002RU | 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-2025-43559-coldfusion-improper-input-validation-vulnerability-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"49221\">vulnerability exists due to improper input validation<\/a> within the HTTP POST request handler of these router models. Attackers exploit this by manipulating the &#8216;submit-url&#8217; argument to trigger a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29962-heap-based-buffer-overflow-vulnerability-in-windows-media\/\"  data-wpil-monitor-id=\"49508\">buffer overflow<\/a>. This can potentially <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43560-improper-input-validation-vulnerability-in-coldfusion-allowing-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"49353\">allow for arbitrary code<\/a> execution.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3659466686\" 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>A conceptual example of the vulnerability might look like this:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/boafrm\/formNtp HTTP\/1.1\nHost: target-router-ip\nContent-Type: application\/x-www-form-urlencoded\nsubmit-url=[BUFFER OVERFLOW PAYLOAD]<\/code><\/pre>\n<p>In the above example, the attacker would replace &#8220;[BUFFER OVERFLOW PAYLOAD] with a specially crafted string designed to exploit the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29964-heap-based-buffer-overflow-vulnerability-in-windows-media\/\"  data-wpil-monitor-id=\"49493\">buffer overflow vulnerability<\/a>.<\/p>\n<p><strong>Mitigation and Recommendations<\/strong><\/p>\n<p>To <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-49842-critical-memory-corruption-vulnerability-in-protected-vm-address-space\/\"  data-wpil-monitor-id=\"58867\">protect against this vulnerability<\/a>, users of the affected TOTOLINK routers are strongly advised to apply the vendor patch as soon as it becomes available. In the meantime, implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation against potential exploitation. It&#8217;s also recommended to restrict network <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8284-unauthenticated-access-and-control-in-packet-power-monitoring-and-control-web-interface\/\"  data-wpil-monitor-id=\"81656\">access to the affected devices and closely monitor<\/a> network traffic for any signs of suspicious activity.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical vulnerability has been discovered in specific TOTOLINK router models, specifically the A702R, A3002R, and A3002RU versions 3.0.0-B20230809.1615. This particular bug allows for remote code execution, potentially leading to a complete system compromise or data leakage. This issue lies in the unknown processing of the file \/boafrm\/formNtp and its HTTP POST request handler [&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":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-43695","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-rce"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/43695","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=43695"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/43695\/revisions"}],"predecessor-version":[{"id":74104,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/43695\/revisions\/74104"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=43695"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=43695"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=43695"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=43695"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=43695"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=43695"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=43695"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=43695"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=43695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}