{"id":79365,"date":"2025-09-30T01:57:05","date_gmt":"2025-09-30T01:57:05","guid":{"rendered":""},"modified":"2025-10-03T17:38:54","modified_gmt":"2025-10-03T23:38:54","slug":"cve-2025-10815-critical-buffer-overflow-vulnerability-in-tenda-ac20","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-10815-critical-buffer-overflow-vulnerability-in-tenda-ac20\/","title":{"rendered":"<strong>CVE-2025-10815: Critical Buffer Overflow Vulnerability in Tenda AC20<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The CVE-2025-10815 is a severe vulnerability discovered in the Tenda AC20 up to version 16.03.08.12. This flaw is found within the HTTP POST Request Handler, specifically the strcpy function of the file \/goform\/SetPptpServerCfg. The vulnerability is triggered by the manipulation of the argument startIp, leading to a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47125-heap-based-buffer-overflow-vulnerability-in-adobe-framemaker\/\"  data-wpil-monitor-id=\"86820\">buffer overflow<\/a>. Buffer Overflow vulnerabilities are <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-57148-arbitrary-file-upload-vulnerability-in-phpgurukul-online-shopping-portal-2-0\/\"  data-wpil-monitor-id=\"86579\">critical<\/a> because they can allow an attacker to execute arbitrary code, potentially leading to complete system compromise. This <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=\"88023\">vulnerability is especially concerning as an exploit is publicly available<\/a> and can be launched remotely, posing a significant risk to any unpatched systems.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-10815<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-2025-26210-deepseek-xss-vulnerability-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"86653\">Potential system<\/a> compromise and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3215828068\" 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-2025-10120-critical-buffer-overflow-vulnerability-in-tenda-ac20-routers\/\"  data-wpil-monitor-id=\"88587\">Tenda AC20<\/a> | Up to version 16.03.08.12<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit takes advantage of a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47099-heap-based-buffer-overflow-vulnerability-in-incopy-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"86790\">buffer overflow vulnerability<\/a> in the strcpy function of the file \/goform\/SetPptpServerCfg in Tenda AC20. By sending a specially crafted HTTP POST request with manipulated startIp argument, an attacker can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47122-heap-based-buffer-overflow-vulnerability-in-adobe-framemaker\/\"  data-wpil-monitor-id=\"86875\">overflow the buffer<\/a>, causing undefined behavior in the system. This could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47129-out-of-bounds-write-vulnerability-in-adobe-framemaker-with-potential-for-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"86887\">potentially allow the attacker to execute arbitrary code<\/a>, leading to a system compromise.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3390725129\" 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 is a conceptual example of how the vulnerability might be exploited. It is a sample HTTP POST <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-58833-cross-site-request-forgery-vulnerability-in-invelity-mygls-connect\/\"  data-wpil-monitor-id=\"86987\">request that an attacker could use to exploit the vulnerability<\/a>.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/goform\/SetPptpServerCfg HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nstartIp=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...<\/code><\/pre>\n<p>In this example, the `startIp` parameter is filled with an excessive number of &#8220;A&#8221; characters, causing a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47131-critical-heap-based-buffer-overflow-vulnerability-in-adobe-framemaker\/\"  data-wpil-monitor-id=\"87333\">buffer overflow<\/a>.<\/p>\n<p><strong>Recommended Mitigations<\/strong><\/p>\n<p>Users of Tenda AC20 are strongly advised to apply the patch provided by the vendor. If the patch cannot be applied immediately, users can use a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) as a temporary mitigation. Regular monitoring for any unusual activity is also recommended until the patch can be applied.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The CVE-2025-10815 is a severe vulnerability discovered in the Tenda AC20 up to version 16.03.08.12. This flaw is found within the HTTP POST Request Handler, specifically the strcpy function of the file \/goform\/SetPptpServerCfg. The vulnerability is triggered by the manipulation of the argument startIp, leading to a buffer overflow. Buffer Overflow vulnerabilities are critical [&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-79365","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\/79365","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=79365"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/79365\/revisions"}],"predecessor-version":[{"id":81398,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/79365\/revisions\/81398"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=79365"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=79365"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=79365"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=79365"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=79365"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=79365"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=79365"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=79365"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=79365"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}