{"id":71985,"date":"2025-09-06T15:02:28","date_gmt":"2025-09-06T15:02:28","guid":{"rendered":""},"modified":"2025-10-15T16:37:16","modified_gmt":"2025-10-15T22:37:16","slug":"cve-2025-9779-totolink-a702r-buffer-overflow-vulnerability-in-the-function-sub-4162dc","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-9779-totolink-a702r-buffer-overflow-vulnerability-in-the-function-sub-4162dc\/","title":{"rendered":"<strong>CVE-2025-9779: TOTOLINK A702R Buffer Overflow Vulnerability in the Function sub_4162DC<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The cybersecurity world has witnessed the emergence of a new high-severity vulnerability in the TOTOLINK A702R 4.0.0-B20211108.1423. This vulnerability, labeled as CVE-2025-9779, involves a buffer overflow that occurs within the function sub_4162DC of the file \/boafrm\/formFilter. It is a serious issue as the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54135-critical-remote-code-execution-vulnerability-in-cursor-code-editor\/\"  data-wpil-monitor-id=\"79576\">vulnerability can be exploited remotely<\/a>, making various systems prone to potential compromise or data leakage. The exploit is public, which increases the risk of it being used by malicious entities.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-9779<br \/>\nSeverity: High (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-2025-42957-critical-backdoor-vulnerability-in-sap-s-4hana-exposes-systems-to-potential-compromise\/\"  data-wpil-monitor-id=\"79594\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-320583788\" 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-2025-9780-totolink-a702r-vulnerability-could-lead-to-system-compromise\/\"  data-wpil-monitor-id=\"85140\">TOTOLINK A702R<\/a> | 4.0.0-B20211108.1423<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability arises from a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7778-arbitrary-file-deletion-vulnerability-in-icons-factory-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"79651\">buffer overflow condition in the function<\/a> sub_4162DC of the file \/boafrm\/formFilter. This occurs when an oversized, specially crafted &#8216;ip6addr&#8217; argument is passed to this function. The function does not properly validate the length of this argument which results in a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9245-high-risk-buffer-overflow-vulnerability-in-linksys-extenders\/\"  data-wpil-monitor-id=\"81045\">buffer overflow<\/a>. An attacker can exploit this vulnerability by sending a specially crafted request to the targeted system, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47136-integer-underflow-vulnerability-in-indesign-desktop-versions-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"79724\">leading to arbitrary code execution or even system<\/a> crash.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3900022755\" 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 is a conceptual example of how the vulnerability might be exploited. This is a hypothetical HTTP request, where an attacker sends a malicious payload in the &#8216;ip6addr&#8217; field.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/boafrm\/formFilter HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ &quot;ip6addr&quot;: &quot;2001:0db8:85a3:0000:0000:8a2e:0370:7334aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa...&quot; }<\/code><\/pre>\n<p>In this example, the value of &#8216;ip6addr&#8217; is deliberately oversized, causing a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47169-heap-based-buffer-overflow-vulnerability-in-microsoft-office-word\/\"  data-wpil-monitor-id=\"82000\">buffer overflow<\/a> in the function sub_4162DC.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>Users are advised to apply the vendor patch as soon as it becomes available. In the meantime, the use of a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as a temporary mitigation, helping to detect and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-7457-macos-authorization-model-exploit-leading-to-potential-mitm-attacks\/\"  data-wpil-monitor-id=\"79957\">potentially block attempts to exploit<\/a> this vulnerability. Additionally, users should monitor any suspicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-12913-sql-injection-vulnerability-in-megatek-communication-system-azora-wireless-network-management\/\"  data-wpil-monitor-id=\"89988\">network activity and ensure that their systems<\/a> are updated with the latest security patches and updates.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The cybersecurity world has witnessed the emergence of a new high-severity vulnerability in the TOTOLINK A702R 4.0.0-B20211108.1423. This vulnerability, labeled as CVE-2025-9779, involves a buffer overflow that occurs within the function sub_4162DC of the file \/boafrm\/formFilter. It is a serious issue as the vulnerability can be exploited remotely, making various systems prone to potential [&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-71985","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\/71985","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=71985"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/71985\/revisions"}],"predecessor-version":[{"id":82865,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/71985\/revisions\/82865"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=71985"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=71985"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=71985"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=71985"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=71985"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=71985"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=71985"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=71985"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=71985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}