{"id":56516,"date":"2025-07-01T21:56:11","date_gmt":"2025-07-01T21:56:11","guid":{"rendered":""},"modified":"2025-08-07T11:27:20","modified_gmt":"2025-08-07T17:27:20","slug":"cve-2025-6627-critical-buffer-overflow-vulnerability-in-totolink-a702r-4-0-0-b20230721-1521","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6627-critical-buffer-overflow-vulnerability-in-totolink-a702r-4-0-0-b20230721-1521\/","title":{"rendered":"<strong>CVE-2025-6627: Critical Buffer Overflow Vulnerability in TOTOLINK A702R 4.0.0-B20230721.1521<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The CVE-2025-6627 is a critical vulnerability discovered in TOTOLINK A702R 4.0.0-B20230721.1521, a widely used wireless router. The vulnerability lies in an unknown code of the file \/boafrm\/formIpv6Setup of the HTTP POST Request Handler component. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6302-critical-remote-stack-based-buffer-overflow-vulnerability-in-totolink-ex1200t\/\"  data-wpil-monitor-id=\"63016\">vulnerability is particularly serious because it can be exploited remotely<\/a>, leading to potential system compromise and data leakage.<br \/>\nThe <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49261-high-impact-remote-file-inclusion-vulnerability-in-themebay-s-diza\/\"  data-wpil-monitor-id=\"63780\">impact of this vulnerability<\/a> is significant. Unpatched devices are at risk of being exploited, potentially leading to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-53298-critical-unauthorized-filesystem-access-vulnerability-in-dell-powerscale-onefs\/\"  data-wpil-monitor-id=\"62984\">unauthorized system access<\/a>, data corruption, or even complete system control. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-33117-privileged-user-vulnerability-in-ibm-qradar-siem\/\"  data-wpil-monitor-id=\"62955\">vulnerability is not just a threat to individual users<\/a>, but also to enterprises that use this technology, potentially impacting their operational integrity and data security.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-6627<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-2025-32878-critical-vulnerability-in-coros-pace-3-devices-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"63195\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2040108144\" 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-2025-9779-totolink-a702r-buffer-overflow-vulnerability-in-the-function-sub-4162dc\/\"  data-wpil-monitor-id=\"85102\">TOTOLINK A702R<\/a> | 4.0.0-B20230721.1521<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6336-critical-buffer-overflow-vulnerability-in-totolink-ex1200t-router\/\"  data-wpil-monitor-id=\"62917\">vulnerability is a buffer overflow<\/a> condition that arises from improper validation of user-supplied data. This happens during the handling of <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=\"66767\">HTTP POST requests<\/a> where the argument &#8216;submit-url&#8217; is manipulated. The flaw can be exploited by an attacker by sending an overly long, specially crafted argument to the &#8216;submit-url&#8217; parameter. This overflow can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4981-critical-file-extraction-vulnerability-in-mattermost-leading-to-potential-remote-code-execution\/\"  data-wpil-monitor-id=\"63074\">potentially allow the execution of arbitrary code<\/a> or cause the application to crash, thus leading to a denial of service.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2087746808\" 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&#8217;s a conceptual example of how the vulnerability might be exploited. This could be a sample HTTP request:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/boafrm\/formIpv6Setup HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nsubmit-url=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA... (long string of &#039;A&#039;s)<\/code><\/pre>\n<p>In this example, the &#8216;submit-url&#8217; argument is filled with an excessively long string of &#8216;A&#8217;s. This can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6337-critical-buffer-overflow-vulnerability-in-totolink-routers\/\"  data-wpil-monitor-id=\"62924\">overflow the buffer<\/a> and potentially allow the attacker to execute arbitrary code or cause the system to crash.<br \/>\nNote: This is a conceptual example and not an actual exploit code. The actual exploit might involve a carefully crafted payload designed to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6291-d-link-dir-825-critical-stack-based-buffer-overflow-vulnerability\/\"  data-wpil-monitor-id=\"63013\">overflow the buffer<\/a> in a specific way to achieve the desired effect.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The CVE-2025-6627 is a critical vulnerability discovered in TOTOLINK A702R 4.0.0-B20230721.1521, a widely used wireless router. The vulnerability lies in an unknown code of the file \/boafrm\/formIpv6Setup of the HTTP POST Request Handler component. This vulnerability is particularly serious because it can be exploited remotely, leading to potential system compromise and data leakage. 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":[86,87],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-56516","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-dos"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/56516","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=56516"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/56516\/revisions"}],"predecessor-version":[{"id":77889,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/56516\/revisions\/77889"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=56516"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=56516"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=56516"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=56516"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=56516"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=56516"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=56516"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=56516"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=56516"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}