{"id":43696,"date":"2025-05-24T07:26:09","date_gmt":"2025-05-24T07:26:09","guid":{"rendered":""},"modified":"2025-06-28T05:18:50","modified_gmt":"2025-06-28T11:18:50","slug":"cve-2025-4834-critical-buffer-overflow-vulnerability-in-totolink-routers","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4834-critical-buffer-overflow-vulnerability-in-totolink-routers\/","title":{"rendered":"<strong>CVE-2025-4834: Critical Buffer Overflow Vulnerability in TOTOLINK Routers<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The cybersecurity community is currently faced with a critical vulnerability, identified as CVE-2025-4834, affecting a range of TOTOLINK routers. This vulnerability lies in an unknown function of the file \/boafrm\/formSetLg, specifically within the HTTP POST Request Handler component. It is a severe issue affecting the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4825-critical-buffer-overflow-vulnerability-in-totolink-a702r-a3002r-and-a3002ru-routers\/\"  data-wpil-monitor-id=\"51236\">TOTOLINK A702R<\/a>, A3002R, and A3002RU models (version 3.0.0-B20230809.1615). The exploitation of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43559-coldfusion-improper-input-validation-vulnerability-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"49242\">vulnerability can lead<\/a> to a buffer overflow, which can potentially compromise the system or lead to data leakage.<br \/>\nAs the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32363-critical-vulnerability-in-medidok-allowing-remote-code-execution\/\"  data-wpil-monitor-id=\"49821\">vulnerability can be exploited remotely<\/a> and the exploit has been disclosed publicly, it poses a major threat to all users of the affected devices. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-39356-serious-deserialization-of-untrusted-data-vulnerability-in-chimpstudio-foodbakery-sticky-cart\/\"  data-wpil-monitor-id=\"52582\">seriousness of this vulnerability<\/a> underscores the importance of understanding its nature and mitigating its potential harm.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-4834<br \/>\nSeverity: Critical (CVSS: 8.8)<br \/>\nAttack Vector: Network (via <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4827-critical-buffer-overflow-vulnerability-in-totolink-http-post-request-handler\/\"  data-wpil-monitor-id=\"50912\">HTTP POST Request<\/a>)<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27891-samsung-mobile-and-wearable-processors-vulnerability-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"49300\">Potential system<\/a> compromise and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3276231788\" 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-2025-6147-critical-buffer-overflow-vulnerability-in-totolink-a702r-router\/\"  data-wpil-monitor-id=\"62010\">TOTOLINK A702R<\/a> | 3.0.0-B20230809.1615<br \/>\n<a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4732-critical-buffer-overflow-vulnerability-in-totolink-a3002r-and-a3002ru\/\"  data-wpil-monitor-id=\"50756\">TOTOLINK A3002R<\/a> | 3.0.0-B20230809.1615<br \/>\nTOTOLINK A3002RU | 3.0.0-B20230809.1615<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability resides in the manipulation of the &#8216;submit-url&#8217; argument in the HTTP <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4391-wordpress-echo-rss-feed-post-generator-plugin-arbitrary-file-upload-vulnerability\/\"  data-wpil-monitor-id=\"50870\">POST Request Handler component of the \/boafrm\/formSetLg file<\/a>. By sending a specially crafted HTTP POST request with the manipulated &#8216;submit-url&#8217; argument, an attacker can cause a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29962-heap-based-buffer-overflow-vulnerability-in-windows-media\/\"  data-wpil-monitor-id=\"49507\">buffer overflow<\/a>. This overflow can overwrite critical data in memory and potentially <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43560-improper-input-validation-vulnerability-in-coldfusion-allowing-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"49352\">allow the attacker to execute arbitrary code<\/a> or cause the system to crash.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1944028706\" 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 this vulnerability might be exploited. The attacker sends a malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4829-critical-buffer-overflow-vulnerability-in-totolink-http-post-request-handler\/\"  data-wpil-monitor-id=\"52196\">HTTP POST request<\/a> to the target device:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/boafrm\/formSetLg HTTP\/1.1\nHost: target-router-ip\nContent-Type: application\/x-www-form-urlencoded\nsubmit-url=&lt;malicious_payload&gt;<\/code><\/pre>\n<p>Please note that &#8220; would be replaced with the actual malicious payload designed to exploit the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29964-heap-based-buffer-overflow-vulnerability-in-windows-media\/\"  data-wpil-monitor-id=\"49492\">buffer overflow vulnerability<\/a>.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>At the moment, the ideal solution is to apply the patch provided by the vendor. For those who cannot implement the patch immediately, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure. These systems can be configured to block or alert about HTTP POST <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47708-cross-site-request-forgery-vulnerability-in-drupal-enterprise-mfa-tfa\/\"  data-wpil-monitor-id=\"49777\">requests that appear to be exploiting this vulnerability<\/a>. Updating to a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-40906-critical-vulnerability-in-bson-xs-versions-0-8-4-and-earlier\/\"  data-wpil-monitor-id=\"50662\">version of the software that is not vulnerable<\/a> is also recommended, if possible.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The cybersecurity community is currently faced with a critical vulnerability, identified as CVE-2025-4834, affecting a range of TOTOLINK routers. This vulnerability lies in an unknown function of the file \/boafrm\/formSetLg, specifically within the HTTP POST Request Handler component. It is a severe issue affecting the TOTOLINK A702R, A3002R, and A3002RU models (version 3.0.0-B20230809.1615). 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],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-43696","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\/43696","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=43696"}],"version-history":[{"count":15,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/43696\/revisions"}],"predecessor-version":[{"id":55686,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/43696\/revisions\/55686"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=43696"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=43696"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=43696"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=43696"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=43696"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=43696"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=43696"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=43696"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=43696"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}