{"id":59631,"date":"2025-07-25T10:11:26","date_gmt":"2025-07-25T10:11:26","guid":{"rendered":""},"modified":"2025-09-15T00:31:11","modified_gmt":"2025-09-15T06:31:11","slug":"cve-2025-7805-critical-vulnerability-in-tenda-fh451-1-0-0-9-leading-to-remote-buffer-overflow-attacks","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-7805-critical-vulnerability-in-tenda-fh451-1-0-0-9-leading-to-remote-buffer-overflow-attacks\/","title":{"rendered":"<strong>CVE-2025-7805: Critical Vulnerability in Tenda FH451 1.0.0.9 Leading to Remote Buffer Overflow Attacks<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical cybersecurity vulnerability, CVE-2025-7805, has been identified in Tenda FH451 1.0.0.9. This vulnerability has the potential to impact any organization or user operating this version of the product, posing a significant risk to sensitive data and system integrity. The issue resides in the fromPptpUserSetting function of the file \/goform\/PPTPUserSetting, which can be exploited to initiate stack-based <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7596-critical-remote-buffer-overflow-vulnerability-in-tenda-fh1205\/\"  data-wpil-monitor-id=\"66394\">buffer overflow attacks remotely<\/a>. Given its <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47998-severe-heap-based-buffer-overflow-vulnerability-in-windows-routing-and-remote-access-service\/\"  data-wpil-monitor-id=\"67306\">severity and potential for remote<\/a> exploitation, this vulnerability demands immediate attention and remediation.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-7805<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-2025-7419-critical-vulnerability-discovered-in-tenda-o3v2-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"68713\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3086147088\" 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-2025-7796-critical-stack-based-buffer-overflow-in-tenda-fh451-1-0-0-9\/\"  data-wpil-monitor-id=\"68285\">Tenda FH451<\/a> | 1.0.0.9<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53964-critical-file-manipulation-vulnerability-in-goldendict\/\"  data-wpil-monitor-id=\"67137\">vulnerability stems from the manipulation<\/a> of the \u201cdelno\u201d argument in the fromPptpUserSetting function. Insecure handling of this argument allows an attacker to overflow the stack buffer, corrupting data and potentially overwriting the return pointer or function pointers to redirect <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-26074-remote-code-execution-vulnerability-in-orkes-conductor-v3-21-11\/\"  data-wpil-monitor-id=\"66018\">execution to the attacker&#8217;s code<\/a>. This could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-41668-critical-file-replacement-leading-to-unauthorized-access\/\"  data-wpil-monitor-id=\"66285\">lead to unauthorized<\/a> access, system compromise, and data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2932550049\" 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>The following is a conceptual representation of how an HTTP <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52362-critical-server-side-request-forgery-vulnerability-in-phproxy\/\"  data-wpil-monitor-id=\"71113\">request exploiting this vulnerability<\/a> could look:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/goform\/PPTPUserSetting HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\ndelno=%cc%x90x90x90...[more malicious shell code]<\/code><\/pre>\n<p>The above payload represents a <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=\"66798\">buffer overflow<\/a> attack where &#8220;%cc%&#8221; might be used to overwrite the return pointer, and &#8220;x90x90x90&#8230;&#8221; could be a NOP sled leading to the malicious shellcode.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>It is crucial for users of Tenda <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7597-critical-stack-based-buffer-overflow-vulnerability-in-tenda-ax1803-1-0-0-1\/\"  data-wpil-monitor-id=\"66959\">FH451<\/a> 1.0.0.9 to apply the vendor patch as soon as possible to fix this vulnerability. In the absence of a patch, or until it can be applied, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as temporary mitigation measures. These <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43192-critical-configuration-issue-in-macos-allowing-potential-system-compromise\/\"  data-wpil-monitor-id=\"82574\">systems should be configured<\/a> to monitor and block any suspicious activity related to the \/goform\/PPTPUserSetting endpoint. The CVE&#8217;s <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4044-critical-information-disclosure-vulnerability-in-lexmark-printer-drivers\/\"  data-wpil-monitor-id=\"82573\">criticality and its public disclosure<\/a> underscore the urgency of these remediation steps.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical cybersecurity vulnerability, CVE-2025-7805, has been identified in Tenda FH451 1.0.0.9. This vulnerability has the potential to impact any organization or user operating this version of the product, posing a significant risk to sensitive data and system integrity. The issue resides in the fromPptpUserSetting function of the file \/goform\/PPTPUserSetting, which can be exploited [&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-59631","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\/59631","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=59631"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59631\/revisions"}],"predecessor-version":[{"id":75091,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/59631\/revisions\/75091"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=59631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=59631"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=59631"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=59631"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=59631"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=59631"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=59631"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=59631"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=59631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}