{"id":51994,"date":"2025-06-14T18:58:09","date_gmt":"2025-06-14T18:58:09","guid":{"rendered":""},"modified":"2025-10-02T23:37:12","modified_gmt":"2025-10-03T05:37:12","slug":"cve-2025-5854-critical-buffer-overflow-vulnerability-in-tenda-ac6-15-03-05-16","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-5854-critical-buffer-overflow-vulnerability-in-tenda-ac6-15-03-05-16\/","title":{"rendered":"<strong>CVE-2025-5854: Critical Buffer Overflow Vulnerability in Tenda AC6 15.03.05.16<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical vulnerability has been discovered in Tenda AC6 15.03.05.16, a widely-used router firmware. The vulnerability, classified as CVE-2025-5854, resides in the function fromadvsetlanip of the file \/goform\/AdvSetLanip. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-45566-critical-memory-corruption-vulnerability-resulting-in-potential-system-compromise\/\"  data-wpil-monitor-id=\"58269\">vulnerability is particularly concerning as it allows the potential<\/a> for remote attackers to overflow the buffer by manipulating the argument lanMask. The implications of this vulnerability are severe, ranging from <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-23244-nvidia-gpu-display-driver-linux-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"58287\">system compromise to potential<\/a> data leakage. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-23107-severe-out-of-bounds-write-vulnerability-in-samsung-mobile-processor-exynos-1480-and-2400\/\"  data-wpil-monitor-id=\"58761\">vulnerability&#8217;s severity<\/a> and possible widespread impact underscore the importance of immediate attention and mitigation.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-5854<br \/>\nSeverity: Critical (CVSS: 8.8)<br \/>\nAttack Vector: Remote<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-49835-memory-corruption-vulnerability-leading-to-potential-data-leakage-or-system-compromise\/\"  data-wpil-monitor-id=\"58384\">Potential system compromise and data leakage<\/a><\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2200394943\" 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-2025-5853-critical-vulnerability-in-tenda-ac6-router-may-lead-to-system-compromise\/\"  data-wpil-monitor-id=\"60023\">Tenda AC6<\/a> | 15.03.05.16<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4578-sql-injection-vulnerability-in-file-provider-wordpress-plugin\/\"  data-wpil-monitor-id=\"58826\">vulnerability resides in the fromadvsetlanip function of the file<\/a> \/goform\/AdvSetLanip. This function does not adequately validate the lanMask argument, rendering it susceptible to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5503-critical-remote-buffer-overflow-vulnerability-in-totolink-x15\/\"  data-wpil-monitor-id=\"58651\">buffer overflow<\/a> attacks. A <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49113-critical-vulnerability-in-roundcube-webmail-allows-remote-code-execution\/\"  data-wpil-monitor-id=\"58333\">remote attacker can exploit this vulnerability<\/a> by sending specially crafted inputs to overflow the buffer, which can lead to arbitrary code execution or denial of service.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3577262017\" 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>This conceptual example demonstrates how a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3755-unauthenticated-remote-attack-on-mitsubishi-electric-melsec-iq-f-series-cpu-modules\/\"  data-wpil-monitor-id=\"58356\">remote attacker<\/a> might exploit this vulnerability. The malicious payload is designed to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32105-buffer-overflow-vulnerability-in-sangoma-img2020-http-server-leading-to-remote-code-execution\/\"  data-wpil-monitor-id=\"58530\">overflow the buffer and potentially execute arbitrary code<\/a>.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/goform\/AdvSetLanip HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nlanMask=255.255.255.0&amp;lanIp=192.168.1.1&amp;lanMask=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...<\/code><\/pre>\n<p>In this example, the &#8216;A&#8217;s represent excess input designed to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-23103-buffer-overflow-vulnerability-in-samsung-exynos-mobile-processors\/\"  data-wpil-monitor-id=\"58781\">overflow the buffer<\/a>.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>Users are advised to apply the vendor patch as soon as it is <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2021-26383-critical-vulnerability-in-amd-tee-puts-system-integrity-and-data-availability-in-jeopardy\/\"  data-wpil-monitor-id=\"88040\">available to mitigate this vulnerability<\/a>. In the interim, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5485-a-critical-vulnerability-pertaining-to-user-name-enumeration-in-web-management-interfaces\/\"  data-wpil-monitor-id=\"61524\">users can deploy Web<\/a> Application Firewalls (WAFs) or Intrusion Detection Systems (IDS) as temporary mitigation measures. These solutions can detect and block malicious <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5671-critical-buffer-overflow-vulnerability-in-totolink-n302r-plus-http-post-request-handler\/\"  data-wpil-monitor-id=\"59501\">requests attempting to exploit this vulnerability<\/a>.<\/p>\n<p><strong>Conclusion<\/strong><\/p>\n<p>The discovery of the CVE-2025-5854 <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5527-critical-vulnerability-exposing-potential-system-compromise-in-tenda-rx3\/\"  data-wpil-monitor-id=\"58686\">vulnerability in Tenda<\/a> AC6 15.03.05.16 highlights the ongoing importance of thorough software testing, regular patch management, and proactive security measures. As cyber threats continue to evolve, it remains crucial for organizations and individuals to stay informed, vigilant, and prepared.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical vulnerability has been discovered in Tenda AC6 15.03.05.16, a widely-used router firmware. The vulnerability, classified as CVE-2025-5854, resides in the function fromadvsetlanip of the file \/goform\/AdvSetLanip. This vulnerability is particularly concerning as it allows the potential for remote attackers to overflow the buffer by manipulating the argument lanMask. The implications of this [&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":[86,87,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-51994","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-dos","attack_vector-rce"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/51994","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=51994"}],"version-history":[{"count":15,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/51994\/revisions"}],"predecessor-version":[{"id":80856,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/51994\/revisions\/80856"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=51994"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=51994"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=51994"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=51994"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=51994"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=51994"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=51994"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=51994"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=51994"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}