{"id":55775,"date":"2025-06-28T13:23:04","date_gmt":"2025-06-28T13:23:04","guid":{"rendered":""},"modified":"2025-08-28T23:06:20","modified_gmt":"2025-08-29T05:06:20","slug":"cve-2025-6487-critical-buffer-overflow-vulnerability-in-totolink-a3002r","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6487-critical-buffer-overflow-vulnerability-in-totolink-a3002r\/","title":{"rendered":"<strong>CVE-2025-6487: Critical Buffer Overflow Vulnerability in TOTOLINK A3002R<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-6487 is a critical vulnerability found in TOTOLINK A3002R 1.1.1-B20200824.0128 that could allow malicious users to potentially compromise the system or cause data leakage. The vulnerability affects the function formRoute of the file \/boafrm\/formRoute. Cybersecurity professionals, network administrators, and users of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6001-cross-site-request-forgery-vulnerability-in-virtuemart-product-image-upload-function\/\"  data-wpil-monitor-id=\"62150\">product should pay close attention to this vulnerability<\/a> due to its high severity and the fact that it can be exploited remotely.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-6487<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=\"63834\">system compromise and data<\/a> leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1662033431\" 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>TOTOLINK A3002R | 1.1.1-B20200824.0128<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43193-critical-memory-handling-vulnerability-in-macos\/\"  data-wpil-monitor-id=\"71697\">vulnerability lies in the handling<\/a> of the &#8216;subnet&#8217; argument in the function formRoute of the file \/boafrm\/formRoute. An unchecked manipulation of the &#8216;subnet&#8217; argument can lead to a stack-based <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6151-critical-remote-buffer-overflow-vulnerability-in-tp-link-tl-wr940n\/\"  data-wpil-monitor-id=\"62112\">buffer overflow<\/a>. A <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6144-critical-buffer-overflow-vulnerability-in-totolink-ex1200t\/\"  data-wpil-monitor-id=\"62117\">buffer overflow<\/a> occurs when the volume of data exceeds the storage capacity of the buffer, causing the extra information to overflow into adjacent buffers. In this case, an attacker can exploit this vulnerability by sending a specially crafted request with a manipulated &#8216;subnet&#8217; argument, causing the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6145-critical-buffer-overflow-vulnerability-in-totolink-ex1200t\/\"  data-wpil-monitor-id=\"62124\">buffer to overflow<\/a> and enabling the execution of arbitrary code.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1934479865\" 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>The following is a conceptual example of how the vulnerability might be exploited. This is a simplified representation and the actual attack would require a specifically crafted malicious payload.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/boafrm\/formRoute HTTP\/1.1\nHost: target-router-ip\nContent-Type: application\/x-www-form-urlencoded\nsubnet=255.255.255.0&amp;overflowing_data=AAAAAAAAAAAAAAAA...<\/code><\/pre>\n<p>In the above example, an excessively long value is used for the &#8216;overflowing_data&#8217; parameter, causing the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6149-critical-buffer-overflow-vulnerability-in-totolink-a3002r\/\"  data-wpil-monitor-id=\"62135\">buffer to overflow<\/a> and potentially allowing the execution of the &#8216;overflowing_data&#8217; as code.<\/p>\n<p><strong>Mitigations<\/strong><\/p>\n<p>To <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-39486-rankie-sql-injection-vulnerability-and-mitigation-measures\/\"  data-wpil-monitor-id=\"63835\">mitigate this vulnerability<\/a>, users are advised to apply the vendor-supplied patch as soon as possible. In the meantime, or in cases where applying the patch is not immediately possible, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) may be used as temporary mitigations. These systems should be <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6513-brain2-database-configuration-file-access-vulnerability-in-standard-windows-users\/\"  data-wpil-monitor-id=\"64523\">configured to detect and block attempts to exploit this vulnerability<\/a> by monitoring for unusual or excessively long &#8216;subnet&#8217; argument values.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-6487 is a critical vulnerability found in TOTOLINK A3002R 1.1.1-B20200824.0128 that could allow malicious users to potentially compromise the system or cause data leakage. The vulnerability affects the function formRoute of the file \/boafrm\/formRoute. Cybersecurity professionals, network administrators, and users of this product should pay close attention to this vulnerability due to its high [&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-55775","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\/55775","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=55775"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/55775\/revisions"}],"predecessor-version":[{"id":64531,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/55775\/revisions\/64531"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=55775"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=55775"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=55775"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=55775"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=55775"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=55775"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=55775"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=55775"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=55775"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}