{"id":53726,"date":"2025-06-20T17:55:54","date_gmt":"2025-06-20T17:55:54","guid":{"rendered":""},"modified":"2025-09-12T05:18:22","modified_gmt":"2025-09-12T11:18:22","slug":"cve-2025-6113-critical-buffer-overflow-vulnerability-in-tenda-fh1203-2-0-1-6","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6113-critical-buffer-overflow-vulnerability-in-tenda-fh1203-2-0-1-6\/","title":{"rendered":"<strong>CVE-2025-6113: Critical Buffer Overflow Vulnerability in Tenda FH1203 2.0.1.6<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>CVE-2025-6113 is a critical vulnerability found in the Tenda FH1203 2.0.1.6 network router. This vulnerability, found in the function fromadvsetlanip of the file \/goform\/AdvSetLanip, allows for buffer overflow attacks. These types of attacks have the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5901-buffer-overflow-vulnerability-in-totolink-t10-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"60512\">potential to compromise system<\/a> integrity and expose sensitive data, making this vulnerability a serious security concern. Given the ubiquity of <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=\"60029\">Tenda routers<\/a>, this vulnerability could potentially impact a significant number of systems worldwide, necessitating immediate attention and remediation.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-6113<br \/>\nSeverity: Critical (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-2025-40912-critical-vulnerability-in-cryptx-for-perl-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"60793\">Potential system<\/a> compromise and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1969566593\" 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>Tenda FH1203 | 2.0.1.6<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52732-php-remote-file-inclusion-vulnerability-in-google-map-targeting-plugin\/\"  data-wpil-monitor-id=\"81949\">targets the fromadvsetlanip function within the \/goform\/AdvSetLanip file<\/a> of the Tenda FH1203 router. Specifically, the vulnerability arises from the manipulation of the lanMask argument, leading to a <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=\"60063\">buffer overflow<\/a>. By sending an overly large packet of data to the lanMask argument, an attacker can cause the system to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5852-critical-buffer-overflow-vulnerability-in-tenda-ac6-15-03-05-16\/\"  data-wpil-monitor-id=\"60069\">overflow the buffer<\/a>, corrupting adjacent memory space. This could potentially allow the attacker to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47163-unauthorized-code-execution-through-microsoft-sharepoint-deserialization-vulnerability\/\"  data-wpil-monitor-id=\"60990\">execute arbitrary code<\/a> or cause a denial of service.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3837558669\" 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 this vulnerability might be exploited. Note that this is a simplified conceptual example and not actual exploit code.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/goform\/AdvSetLanip HTTP\/1.1\nHost: target.router.ip\nContent-Type: application\/x-www-form-urlencoded\nlanMask=255.255.255.255&amp;oversizedData=[...]<\/code><\/pre>\n<p>In this example, the &#8220;oversizedData&#8221; stands for the excessive amount of data that causes the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5848-critical-buffer-overflow-vulnerability-in-tenda-ac15-15-03-05-19-multi\/\"  data-wpil-monitor-id=\"60075\">buffer overflow<\/a>.<\/p>\n<p><strong>Mitigation and Recommendations<\/strong><\/p>\n<p>Users of affected Tenda FH1203 routers are strongly advised to apply the vendor patch as soon as possible. In the absence of a patch, or as a temporary mitigation, firewalls or intrusion detection systems (IDS) can be configured to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45984-critical-command-injection-vulnerability-detected-in-blink-routers\/\"  data-wpil-monitor-id=\"61366\">detect and block attempts to exploit this vulnerability<\/a>. <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-34509-hardcoded-user-account-in-sitecore-xm-and-xp-enabling-unauthenticated-remote-access\/\"  data-wpil-monitor-id=\"62792\">Users should also consider enabling<\/a> automatic updates to ensure that future patches are applied promptly. Regular monitoring and logging of network traffic can also aid in identifying any <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-7457-macos-authorization-model-exploit-leading-to-potential-mitm-attacks\/\"  data-wpil-monitor-id=\"80032\">potential exploitation<\/a> attempts.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview CVE-2025-6113 is a critical vulnerability found in the Tenda FH1203 2.0.1.6 network router. This vulnerability, found in the function fromadvsetlanip of the file \/goform\/AdvSetLanip, allows for buffer overflow attacks. These types of attacks have the potential to compromise system integrity and expose sensitive data, making this vulnerability a serious security concern. Given the ubiquity [&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],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-53726","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-dos"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53726","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=53726"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53726\/revisions"}],"predecessor-version":[{"id":74412,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53726\/revisions\/74412"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=53726"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=53726"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=53726"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=53726"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=53726"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=53726"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=53726"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=53726"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=53726"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}