{"id":57287,"date":"2025-07-05T01:28:35","date_gmt":"2025-07-05T01:28:35","guid":{"rendered":""},"modified":"2025-09-03T19:03:41","modified_gmt":"2025-09-04T01:03:41","slug":"cve-2025-6825-critical-buffer-overflow-vulnerability-in-totolink-a702r","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6825-critical-buffer-overflow-vulnerability-in-totolink-a702r\/","title":{"rendered":"<strong>CVE-2025-6825: Critical Buffer Overflow Vulnerability in TOTOLINK A702R<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical vulnerability, identified as CVE-2025-6825, has been discovered in TOTOLINK A702R routers up to version 4.0.0-B20230721.1521. This flaw lies within an unspecified functionality of the file \/boafrm\/formWlSiteSurvey, which is part of the HTTP POST Request Handler component. The vulnerability is of significant concern as it can be exploited remotely and may <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50160-heap-based-buffer-overflow-in-windows-rras-posing-system-compromise-risk\/\"  data-wpil-monitor-id=\"78474\">compromise the entire system<\/a> or result in data leakage. Given the widespread use of TOTOLINK routers, the potential <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49261-high-impact-remote-file-inclusion-vulnerability-in-themebay-s-diza\/\"  data-wpil-monitor-id=\"63776\">impact of this vulnerability<\/a> is immense and demands immediate attention.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-6825<br \/>\nSeverity: Critical, CVSS score 8.8<br \/>\nAttack Vector: Remote<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: Possible <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5866-critical-vulnerability-in-rt-thread-5-1-0-potentially-leading-to-system-compromise-or-data-leakage\/\"  data-wpil-monitor-id=\"63824\">system compromise and data<\/a> leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2880418053\" 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: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\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: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\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: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6627-critical-buffer-overflow-vulnerability-in-totolink-a702r-4-0-0-b20230721-1521\/\"  data-wpil-monitor-id=\"64658\">TOTOLINK A702R<\/a> | Up to version 4.0.0-B20230721.1521<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit targets the argument &#8216;submit-url&#8217; in the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8243-critical-buffer-overflow-vulnerability-in-totolink-x15-http-post-request-handler\/\"  data-wpil-monitor-id=\"66766\">HTTP POST Request<\/a> Handler component of the router&#8217;s firmware. By sending a specially crafted request, an attacker can manipulate this argument to trigger a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6393-critical-buffer-overflow-vulnerability-in-totolink-products\/\"  data-wpil-monitor-id=\"63794\">buffer overflow<\/a>. This overflow can subsequently lead to system instability, unauthorized access, or even <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-47029-critical-remote-code-execution-vulnerability-in-ncr-terminal-handler\/\"  data-wpil-monitor-id=\"63743\">remote command execution<\/a>. The potential for remote exploitation coupled with the absence of any <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-47294-critical-vulnerability-in-ncr-terminal-handler-v1-5-1-allows-user-account-manipulation\/\"  data-wpil-monitor-id=\"63746\">user interaction makes this a particularly dangerous vulnerability<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1756403844\" 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>An attacker might exploit this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48921-cross-site-request-forgery-vulnerability-in-drupal-open-social\/\"  data-wpil-monitor-id=\"65018\">vulnerability with a malicious HTTP POST request<\/a> similar to the following:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/boafrm\/formWlSiteSurvey HTTP\/1.1\nHost: vulnerable.router.com\nContent-Type: application\/x-www-form-urlencoded\nsubmit-url=&lt;malicious_payload&gt;<\/code><\/pre>\n<p>In this example, `<malicious_payload>` would be a string designed to overflow the buffer associated with the &#8216;submit-url&#8217; argument, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32454-out-of-bounds-read-in-teamcenter-visualization-leading-to-potential-code-execution\/\"  data-wpil-monitor-id=\"64118\">potentially leading<\/a> to unexpected behavior or unauthorized access.<\/p>\n<p><strong>Remediation<\/strong><\/p>\n<p>As a mitigation measure, users are advised to apply the vendor&#8217;s patch as soon as it becomes available. In the meantime, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50213-special-element-injection-vulnerability-in-apache-airflow-providers-snowflake\/\"  data-wpil-monitor-id=\"63996\">provide temporary mitigation against potential attacks exploiting this vulnerability<\/a>. However, it is critical to note that these are temporary solutions and cannot fully eliminate the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52709-high-risk-deserialization-of-untrusted-data-vulnerability-in-everest-forms\/\"  data-wpil-monitor-id=\"65248\">risks associated with this vulnerability<\/a>. Regular patching and system updates remain the most effective <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-20217-denial-of-service-vulnerability-in-snort-3-detection-engine-of-cisco-secure-firewall-threat-defense-software\/\"  data-wpil-monitor-id=\"77106\">defense against such threats<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical vulnerability, identified as CVE-2025-6825, has been discovered in TOTOLINK A702R routers up to version 4.0.0-B20230721.1521. This flaw lies within an unspecified functionality of the file \/boafrm\/formWlSiteSurvey, which is part of the HTTP POST Request Handler component. The vulnerability is of significant concern as it can be exploited remotely and may compromise 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":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-57287","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\/57287","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=57287"}],"version-history":[{"count":13,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/57287\/revisions"}],"predecessor-version":[{"id":70851,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/57287\/revisions\/70851"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=57287"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=57287"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=57287"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=57287"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=57287"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=57287"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=57287"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=57287"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=57287"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}