{"id":55226,"date":"2025-06-26T13:02:06","date_gmt":"2025-06-26T13:02:06","guid":{"rendered":""},"modified":"2025-08-07T11:27:21","modified_gmt":"2025-08-07T17:27:21","slug":"cve-2025-6337-critical-buffer-overflow-vulnerability-in-totolink-routers","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6337-critical-buffer-overflow-vulnerability-in-totolink-routers\/","title":{"rendered":"<strong>CVE-2025-6337: Critical Buffer Overflow Vulnerability in TOTOLINK Routers<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical vulnerability, CVE-2025-6337, has been identified in TOTOLINK routers A3002R and A3002RU. This vulnerability affects an unknown function of the file \/boafrm\/formTmultiAP of the HTTP POST Request Handler component. <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6112-critical-buffer-overflow-vulnerability-in-tenda-fh1205\/\"  data-wpil-monitor-id=\"61537\">Buffer overflow<\/a> is triggered by the manipulation of the &#8216;submit-url&#8217; argument which can potentially compromise the system or leak data. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6172-high-severity-permission-vulnerability-in-mobile-applications\/\"  data-wpil-monitor-id=\"61733\">vulnerability is particularly severe<\/a> as it can be exploited remotely, and the exploit has already been disclosed to the public, increasing the risk of potential attacks.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-6337<br \/>\nSeverity: Critical (8.8 CVSS Severity Score)<br \/>\nAttack Vector: Remote<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49415-path-traversal-vulnerability-in-fw-gallery-with-potential-for-system-compromise\/\"  data-wpil-monitor-id=\"62596\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2449525486\" 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>TOTOLINK A3002R | 3.0.0-B20230809.1615<br \/>\nTOTOLINK A3002RU | 4.0.0-B20230531.1404<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability resides in the HTTP POST Request Handler component of the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6138-critical-buffer-overflow-vulnerability-in-totolink-t10-4-1-8cu-5207\/\"  data-wpil-monitor-id=\"61787\">TOTOLINK<\/a> routers. Specifically, an unknown function in the \/boafrm\/formTmultiAP file. The exploit occurs when a malicious actor manipulates the &#8216;submit-url&#8217; argument in an <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=\"62246\">HTTP POST request<\/a>. This manipulation triggers a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6113-critical-buffer-overflow-vulnerability-in-tenda-fh1203-2-0-1-6\/\"  data-wpil-monitor-id=\"61547\">buffer overflow<\/a>, which can lead to arbitrary code execution. This means that the attacker can run their own commands on the compromised device, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-6370-critical-vulnerability-in-d-link-dir-619l-2-06b01-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"63403\">potentially gaining full control over the system<\/a> or leaking sensitive data.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2041955298\" 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. This is a sample <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8243-critical-buffer-overflow-vulnerability-in-totolink-x15-http-post-request-handler\/\"  data-wpil-monitor-id=\"66768\">HTTP POST request<\/a> that manipulates the &#8216;submit-url&#8217; argument.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/boafrm\/formTmultiAP HTTP\/1.1\nHost: target_router_ip\nContent-Type: application\/x-www-form-urlencoded\nsubmit-url=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA... [and so on]<\/code><\/pre>\n<p>In this example, the &#8216;submit-url&#8217; argument is filled with a long string of &#8216;A&#8217; characters, causing a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47868-heap-based-buffer-overflow-vulnerability-in-apache-nuttx-rtos-repository\/\"  data-wpil-monitor-id=\"61556\">buffer overflow<\/a>. This is only a conceptual example and the actual exploit may involve more complex and specific payloads.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>The immediate recommended mitigation is to apply the vendor-provided patch. In cases where the patch cannot be applied immediately, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary mitigation. However, these should not be considered long-term solutions as they may not fully protect against all <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49847-buffer-overflow-vulnerability-in-llama-cpp-leading-to-potential-code-execution\/\"  data-wpil-monitor-id=\"62595\">potential exploits of this vulnerability<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical vulnerability, CVE-2025-6337, has been identified in TOTOLINK routers A3002R and A3002RU. This vulnerability affects an unknown function of the file \/boafrm\/formTmultiAP of the HTTP POST Request Handler component. Buffer overflow is triggered by the manipulation of the &#8216;submit-url&#8217; argument which can potentially compromise the system or leak data. This vulnerability is particularly [&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-55226","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\/55226","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=55226"}],"version-history":[{"count":9,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/55226\/revisions"}],"predecessor-version":[{"id":60728,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/55226\/revisions\/60728"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=55226"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=55226"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=55226"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=55226"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=55226"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=55226"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=55226"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=55226"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=55226"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}