{"id":43521,"date":"2025-05-24T04:25:07","date_gmt":"2025-05-24T04:25:07","guid":{"rendered":""},"modified":"2025-09-14T23:36:47","modified_gmt":"2025-09-15T05:36:47","slug":"cve-2025-4831-critical-buffer-overflow-vulnerability-in-totolink-routers","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4831-critical-buffer-overflow-vulnerability-in-totolink-routers\/","title":{"rendered":"<strong>CVE-2025-4831: Critical Buffer Overflow Vulnerability in TOTOLINK Routers<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-4831 is a critical vulnerability that has been identified in popular TOTOLINK router models such as A702R, A3002R and A3002RU with version 3.0.0-B20230809.1615. This vulnerability, originating from a faulty HTTP POST Request Handler, could potentially result in a system compromise or data leakage. Exploitation of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-24780-remote-code-execution-vulnerability-in-apache-iotdb\/\"  data-wpil-monitor-id=\"48961\">vulnerability could be initiated remotely<\/a>, making it a significant threat to any organization or individual using the affected routers. It&#8217;s crucial to understand the nature of this threat, its potential impacts, and how to mitigate it.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-4831<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-2025-31049-untrusted-data-deserialization-vulnerability-in-themeton-dash-exposes-systems-to-object-injection\/\"  data-wpil-monitor-id=\"53863\">System compromise or data<\/a> leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-307623334\" 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=\"51239\">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=\"50759\">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-2025-47708-cross-site-request-forgery-vulnerability-in-drupal-enterprise-mfa-tfa\/\"  data-wpil-monitor-id=\"49779\">vulnerability lies in the HTTP POST request<\/a> handler of the affected routers. Specifically, an unknown part of the file \/boafrm\/formSiteSurveyProfile is prone to a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45863-buffer-overflow-vulnerability-in-totolink-a3002r-routers\/\"  data-wpil-monitor-id=\"48882\">buffer overflow vulnerability<\/a> when the &#8216;submit-url&#8217; argument is manipulated. This can lead to unpredictable behavior including program crashes, incorrect operation, or even <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4660-critical-remote-code-execution-vulnerability-in-windows-secureconnector-agent\/\"  data-wpil-monitor-id=\"48968\">execution of arbitrary code<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3793627106\" 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>Here is a conceptual example of how an 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=\"50140\">request might be manipulated to exploit this vulnerability<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/boafrm\/formSiteSurveyProfile HTTP\/1.1\nHost: target_router_ip\nContent-Type: application\/x-www-form-urlencoded\nsubmit-url=&lt;malicious_payload&gt;<\/code><\/pre>\n<p>In this example, &#8220; would be a carefully crafted string designed to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45861-critical-buffer-overflow-vulnerability-in-totolink-a3002r-router\/\"  data-wpil-monitor-id=\"48898\">overflow the buffer<\/a> and potentially inject malicious code into the system.<\/p>\n<p><strong>Recommended Mitigation<\/strong><\/p>\n<p>The most effective mitigation <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46658-critical-security-vulnerability-in-exonautweb-s-4c-strategies-exonaut-21-6\/\"  data-wpil-monitor-id=\"82468\">strategy is to apply the vendor&#8217;s patch for this vulnerability<\/a>. In the absence of a patch, or until it can be applied, utilizing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. These systems can be configured to block or alert on any attempts to exploit this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4827-critical-buffer-overflow-vulnerability-in-totolink-http-post-request-handler\/\"  data-wpil-monitor-id=\"50911\">vulnerability by monitoring for unusual or malicious HTTP POST requests<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-4831 is a critical vulnerability that has been identified in popular TOTOLINK router models such as A702R, A3002R and A3002RU with version 3.0.0-B20230809.1615. This vulnerability, originating from a faulty HTTP POST Request Handler, could potentially result in a system compromise or data leakage. Exploitation of this vulnerability could be initiated remotely, making it a [&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-43521","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\/43521","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=43521"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/43521\/revisions"}],"predecessor-version":[{"id":74989,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/43521\/revisions\/74989"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=43521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=43521"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=43521"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=43521"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=43521"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=43521"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=43521"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=43521"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=43521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}