{"id":59780,"date":"2025-07-31T16:18:38","date_gmt":"2025-07-31T16:18:38","guid":{"rendered":""},"modified":"2025-10-02T00:14:35","modified_gmt":"2025-10-02T06:14:35","slug":"cve-2025-8137-critical-buffer-overflow-vulnerability-in-totolink-a702r","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-8137-critical-buffer-overflow-vulnerability-in-totolink-a702r\/","title":{"rendered":"<strong>CVE-2025-8137: Critical Buffer Overflow Vulnerability in TOTOLINK A702R<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The cybersecurity world is currently dealing with a critical vulnerability identified as CVE-2025-8137. This flaw was discovered in TOTOLINK A702R 4.0.0-B20230721.1521, which is widely used in the networking domain. The severity of the issue is heightened because the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49416-critical-php-remote-file-inclusion-vulnerability-in-fastw3b-llc-fw-gallery\/\"  data-wpil-monitor-id=\"66089\">vulnerability affects an unknown functionality of the file<\/a> \/boafrm\/formIpQoS, a component of the HTTP POST Request Handler. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7460-critical-vulnerability-in-totolink-t6-leads-to-buffer-overflow\/\"  data-wpil-monitor-id=\"66866\">vulnerability matters because it can potentially lead<\/a> to system compromise or data leakage, and the exploit has been publicly disclosed, making it accessible to malicious actors.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-8137<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-2025-7027-critical-firmware-vulnerability-enabling-arbitrary-memory-writes-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"69803\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2998278939\" 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-2025-9779-totolink-a702r-buffer-overflow-vulnerability-in-the-function-sub-4162dc\/\"  data-wpil-monitor-id=\"85110\">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-2024-54189-privilege-escalation-vulnerability-in-parallels-desktop-for-mac-snapshot-functionality\/\"  data-wpil-monitor-id=\"69802\">vulnerability exploits an argument called &#8216;mac<\/a>&#8216; in the HTTP POST Request Handler. The flaw originates from incorrect buffer handling in the \/boafrm\/formIpQoS file. The manipulation of the &#8216;mac&#8217; argument can lead to a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7596-critical-remote-buffer-overflow-vulnerability-in-tenda-fh1205\/\"  data-wpil-monitor-id=\"66443\">buffer overflow<\/a> condition. <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53076-critical-overread-buffers-vulnerability-in-samsung-s-rlottie\/\"  data-wpil-monitor-id=\"66219\">Buffer overflow vulnerabilities<\/a> can allow an attacker to overwrite data in memory, potentially leading to the execution of arbitrary code, system crashes, or a breach of data integrity.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1610688843\" 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>Although the exact exploit code has not been provided to maintain ethical boundaries, a conceptual example of how this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-21120-trusting-http-permission-methods-on-the-server-side-vulnerability-in-dell-avamar\/\"  data-wpil-monitor-id=\"81495\">vulnerability might be exploited could look like the following HTTP<\/a> POST request:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/boafrm\/formIpQoS HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ &quot;mac&quot;: &quot;OVERFLOW_STRING&quot; }<\/code><\/pre>\n<p>In this example, &#8220;OVERFLOW_STRING&#8221; would be a specially crafted string that is longer than the buffer can handle, causing it to overflow.<\/p>\n<p><strong>Countermeasures and Mitigation<\/strong><\/p>\n<p>Users are advised to apply the vendor patch as soon as it becomes available to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-58280-object-heap-address-exposure-vulnerability-in-ark-ets\/\"  data-wpil-monitor-id=\"87271\">address this vulnerability<\/a>. In the meantime, implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation, helping to detect and prevent exploit attempts. Regularly updating and patching your <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-33077-local-stack-based-buffer-overflow-vulnerability-in-ibm-engineering-systems-design-rhapsody\/\"  data-wpil-monitor-id=\"68343\">systems is the best measure to protect against such vulnerabilities<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The cybersecurity world is currently dealing with a critical vulnerability identified as CVE-2025-8137. This flaw was discovered in TOTOLINK A702R 4.0.0-B20230721.1521, which is widely used in the networking domain. The severity of the issue is heightened because the vulnerability affects an unknown functionality of the file \/boafrm\/formIpQoS, a component of the HTTP POST Request [&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-59780","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\/59780","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=59780"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59780\/revisions"}],"predecessor-version":[{"id":80114,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59780\/revisions\/80114"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=59780"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=59780"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=59780"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=59780"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=59780"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=59780"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=59780"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=59780"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=59780"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}