{"id":33855,"date":"2025-04-29T21:01:31","date_gmt":"2025-04-29T21:01:31","guid":{"rendered":""},"modified":"2025-09-06T12:12:36","modified_gmt":"2025-09-06T18:12:36","slug":"cve-2025-3786-critical-buffer-overflow-vulnerability-in-tenda-ac15","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-3786-critical-buffer-overflow-vulnerability-in-tenda-ac15\/","title":{"rendered":"<strong>CVE-2025-3786: Critical Buffer Overflow Vulnerability in Tenda AC15<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A severe vulnerability has been identified in Tenda AC15, a widely used WiFi router, that could potentially lead to system compromise or data leakage. This vulnerability, designated as CVE-2025-3786, affects versions up to 15.03.05.19 and has been classified as critical. It lies within the function fromSetWirelessRepeat of the file \/goform\/WifiExtraSet, where a manipulation of the &#8216;mac&#8217; argument allows for a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28024-buffer-overflow-vulnerability-in-totolink-a810r-v4-1-2cu-5182-b20201026\/\"  data-wpil-monitor-id=\"39574\">buffer overflow<\/a>. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28039-pre-auth-remote-command-execution-vulnerability-in-totolink-ex1200t\/\"  data-wpil-monitor-id=\"39526\">vulnerability matters because it can be exploited remotely<\/a>, posing a significant risk to all systems and networks using the affected Tenda AC15 routers.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-3786<br \/>\nSeverity: Critical, CVSS Score 8.8<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32849-vulnerability-in-telecontrol-server-basic-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"39527\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3438318274\" 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-2025-5851-critical-buffer-overflow-vulnerability-in-tenda-ac15-15-03-05-19-multi\/\"  data-wpil-monitor-id=\"60066\">Tenda AC15<\/a> | Up to 15.03.05.19<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit works by manipulating the &#8216;mac&#8217; argument in the fromSetWirelessRepeat function. By passing an oversized input to this argument, an attacker can trigger a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3619-critical-heap-buffer-overflow-vulnerability-in-google-chrome-codecs\/\"  data-wpil-monitor-id=\"40062\">buffer overflow<\/a>, causing the system to overwrite memory that was not allocated for this purpose. This can lead to unpredictable system behavior, including crashes, data corruption, and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-40446-arbitrary-code-execution-vulnerability-in-forkosh-mime-tex\/\"  data-wpil-monitor-id=\"39884\">code execution<\/a>. In this case, an attacker could potentially gain <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28233-incorrect-access-control-vulnerability-in-bw-broadcast-hardware\/\"  data-wpil-monitor-id=\"38520\">control over the system or access<\/a> sensitive information.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2814301550\" 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&#8217;s a conceptual example of how an attacker might <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52478-stored-cross-site-scripting-vulnerability-in-n8n-s-form-trigger-node\/\"  data-wpil-monitor-id=\"79448\">trigger this vulnerability<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/goform\/WifiExtraSet HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nmac=00:00:00:00:00:00%00...[repeat until buffer overflow]<\/code><\/pre>\n<p>In this example, the MAC address argument is filled with a long string of null bytes, triggering a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3993-critical-buffer-overflow-vulnerability-in-totolink-n150rt\/\"  data-wpil-monitor-id=\"40464\">buffer overflow<\/a>.<br \/>\nFor <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52950-unauthorized-access-exploitation-in-juniper-networks-security-director\/\"  data-wpil-monitor-id=\"79449\">network administrators and security<\/a> professionals, it&#8217;s crucial to apply the vendor-supplied patch immediately. As a temporary measure, a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can be used to mitigate the risk.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A severe vulnerability has been identified in Tenda AC15, a widely used WiFi router, that could potentially lead to system compromise or data leakage. This vulnerability, designated as CVE-2025-3786, affects versions up to 15.03.05.19 and has been classified as critical. It lies within the function fromSetWirelessRepeat of the file \/goform\/WifiExtraSet, where a manipulation of [&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-33855","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\/33855","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=33855"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/33855\/revisions"}],"predecessor-version":[{"id":71881,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/33855\/revisions\/71881"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=33855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=33855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=33855"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=33855"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=33855"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=33855"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=33855"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=33855"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=33855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}