{"id":54072,"date":"2025-06-22T18:18:27","date_gmt":"2025-06-22T18:18:27","guid":{"rendered":""},"modified":"2025-10-14T23:20:18","modified_gmt":"2025-10-15T05:20:18","slug":"cve-2025-6147-critical-buffer-overflow-vulnerability-in-totolink-a702r-router","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6147-critical-buffer-overflow-vulnerability-in-totolink-a702r-router\/","title":{"rendered":"<strong>CVE-2025-6147: Critical Buffer Overflow Vulnerability in TOTOLINK A702R Router<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In the constantly evolving field of cybersecurity, new vulnerabilities are discovered regularly, posing threats to various software and hardware. The latest in this list is a critical vulnerability found in TOTOLINK A702R 4.0.0-B20230721.1521, a widely used router. This vulnerability, identified as CVE-2025-6147, affects the unknown <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=\"63083\">code of the file<\/a> \/boafrm\/formSysLog in the HTTP POST Request Handler component. The significance of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49136-critical-vulnerability-in-listmonk-allows-unauthorized-access-to-sensitive-environment-variables\/\"  data-wpil-monitor-id=\"60368\">vulnerability lies in its potential to allow<\/a> remote attackers to execute a buffer overflow attack, leading to system compromise and data leakage.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-6147<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-2025-40912-critical-vulnerability-in-cryptx-for-perl-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"60779\">Potential system<\/a> compromise and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-310136547\" 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=\"64654\">TOTOLINK A702R<\/a> | 4.0.0-B20230721.1521<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit targets the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6162-critical-buffer-overflow-vulnerability-in-totolink-ex1200t-http-post-request-handler\/\"  data-wpil-monitor-id=\"62241\">HTTP POST Request Handler component in the TOTOLINK<\/a> A702R router. Specifically, it affects an unknown part of the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54444-unrestricted-file-upload-leading-to-code-injection-in-samsung-electronics-magicinfo-9-server\/\"  data-wpil-monitor-id=\"76413\">code in the \/boafrm\/formSysLog file<\/a>. The vulnerability is triggered when the &#8216;submit-url&#8217; argument is manipulated, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5901-buffer-overflow-vulnerability-in-totolink-t10-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"60491\">leading to a buffer overflow<\/a>. This flaw allows an attacker to remotely <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5905-critical-buffer-overflow-vulnerability-in-totolink-t10\/\"  data-wpil-monitor-id=\"60547\">overflow the buffer<\/a> with arbitrary data, which can potentially lead to arbitrary code execution, thereby compromising the system and potentially leading to data leaks.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-174744267\" 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. In this case, a malicious HTTP POST request is sent to the target, with a manipulated &#8216;submit-url&#8217; argument in the request body, causing a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5902-critical-buffer-overflow-vulnerability-in-totolink-t10\/\"  data-wpil-monitor-id=\"60557\">buffer overflow<\/a>.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/boafrm\/formSysLog HTTP\/1.1\nHost: target.totolink.com\nContent-Type: application\/x-www-form-urlencoded\nsubmit-url=http:\/\/%s\/%s&amp;%s=&lt;OVERFLOWED BUFFER DATA&gt;<\/code><\/pre>\n<p><strong>Mitigation and Prevention<\/strong><\/p>\n<p>As the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-58462-sql-injection-vulnerability-in-opexus-foiaxpress-public-access-link\/\"  data-wpil-monitor-id=\"89926\">vulnerability has been publicly<\/a> disclosed, it is essential to apply mitigation strategies promptly. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8853-authentication-bypass-vulnerability-in-official-document-management-system\/\"  data-wpil-monitor-id=\"82642\">official vendor has released a patch to address this vulnerability<\/a>. Users are strongly encouraged to apply this patch as soon as possible to their <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9779-totolink-a702r-buffer-overflow-vulnerability-in-the-function-sub-4162dc\/\"  data-wpil-monitor-id=\"85103\">TOTOLINK A702R<\/a> routers.<br \/>\nIn addition to applying the vendor patch, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5485-a-critical-vulnerability-pertaining-to-user-name-enumeration-in-web-management-interfaces\/\"  data-wpil-monitor-id=\"61506\">users can use Web<\/a> Application Firewalls (WAF) or Intrusion Detection Systems (IDS) as temporary mitigation measures. These systems can help detect and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8059-critical-privilege-escalation-vulnerability-in-b-blocks-wordpress-plugin\/\"  data-wpil-monitor-id=\"76412\">block malicious traffic that attempts to exploit this vulnerability<\/a>.<br \/>\nTo conclude, the discovery of the CVE-2025-6147 <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-1041-critical-improper-input-validation-vulnerability-in-avaya-call-management-system\/\"  data-wpil-monitor-id=\"60452\">vulnerability underscores the importance of regular patch management<\/a> and the use of security tools like WAF and IDS to enhance the overall security posture of your systems and networks.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In the constantly evolving field of cybersecurity, new vulnerabilities are discovered regularly, posing threats to various software and hardware. The latest in this list is a critical vulnerability found in TOTOLINK A702R 4.0.0-B20230721.1521, a widely used router. This vulnerability, identified as CVE-2025-6147, affects the unknown code of the file \/boafrm\/formSysLog in the HTTP POST [&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-54072","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\/54072","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=54072"}],"version-history":[{"count":14,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/54072\/revisions"}],"predecessor-version":[{"id":82797,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/54072\/revisions\/82797"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=54072"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=54072"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=54072"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=54072"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=54072"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=54072"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=54072"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=54072"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=54072"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}