{"id":37892,"date":"2025-05-13T19:35:00","date_gmt":"2025-05-13T19:35:00","guid":{"rendered":""},"modified":"2025-05-17T23:01:41","modified_gmt":"2025-05-17T23:01:41","slug":"cve-2025-4355-critical-heap-based-buffer-overflow-vulnerability-in-tenda-dap-1520","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4355-critical-heap-based-buffer-overflow-vulnerability-in-tenda-dap-1520\/","title":{"rendered":"<strong>CVE-2025-4355: Critical Heap-Based Buffer Overflow Vulnerability in Tenda DAP-1520<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The vulnerability CVE-2025-4355 is a critical security flaw discovered in the Tenda DAP-1520, a popular networking device. The vulnerability resides within the &#8216;set_ws_action&#8217; function of the &#8216;\/dws\/api\/&#8217; file, leading to a heap-based buffer overflow. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-6631-powersystem-center-vulnerability-could-allow-privilege-escalation\/\"  data-wpil-monitor-id=\"43346\">vulnerability is especially serious as it allows<\/a> a potential attacker to initiate the attack remotely, which could lead to a full system compromise or data leakage. Given the widespread use of Tenda DAP-1520, this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-49126-critical-vulnerability-in-solid-edge-se2023-allows-for-potential-system-compromise\/\"  data-wpil-monitor-id=\"43430\">vulnerability could impact a large number of systems<\/a> and networks globally.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-4355<br \/>\nSeverity: Critical (8.8 CVSS Score)<br \/>\nAttack Vector: Remote<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-49129-stack-overflow-vulnerability-in-solid-edge-se2023-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"43512\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1390774804\" 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 DAP-1520 | 1.10B04_BETA02<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-13418-critical-arbitrary-file-upload-vulnerability-in-multiple-wordpress-plugins-and-themes\/\"  data-wpil-monitor-id=\"42937\">vulnerability exploits the &#8216;set_ws_action&#8217; function of the &#8216;\/dws\/api\/&#8217; file<\/a>. The function does not properly manage the memory space allocated for user-supplied data, leading to a heap-based <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-38583-stack-based-buffer-overflow-vulnerability-in-gtkwave-3-3-115\/\"  data-wpil-monitor-id=\"43042\">buffer overflow<\/a> condition. An attacker can send a specially crafted payload that overflows the buffer, which can result in <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-37419-critical-arbitrary-code-execution-vulnerability-in-gtkwave-3-3-115\/\"  data-wpil-monitor-id=\"42676\">arbitrary code execution<\/a> or even a system crash.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-20078673\" 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 an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5353-local-authenticated-attacker-exploit-in-ivanti-workspace-control\/\"  data-wpil-monitor-id=\"90998\">attacker might exploit<\/a> this vulnerability. In this scenario, the attacker sends a crafted HTTP POST <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47462-cross-site-request-forgery-vulnerability-in-ohidul-islam-challan-leading-to-privilege-escalation\/\"  data-wpil-monitor-id=\"43677\">request to the vulnerable<\/a> endpoint:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/dws\/api\/set_ws_action HTTP\/1.1\nHost: vulnerable-device-ip\nContent-Type: application\/json\n{ &quot;malicious_payload&quot;: &quot;A&quot;*5000 }<\/code><\/pre>\n<p>In this example, the &#8216;malicious_payload&#8217; is a string of &#8216;A&#8217; characters that is much larger than what the buffer can handle. This input will cause the buffer to overflow, leading to potential <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-36915-arbitrary-code-execution-vulnerability-in-gtkwave-3-3-115\/\"  data-wpil-monitor-id=\"42730\">execution of arbitrary code<\/a> or crashing the system.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>To protect your systems from this vulnerability, it is recommended to apply the vendor-provided <a class=\"wpil_keyword_link\" href=\"https:\/\/ameeba.com\"   title=\"patch\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"42644\">patch<\/a> immediately. If the patch cannot be applied immediately, using a Web Application Firewall (WAF) or an <a class=\"wpil_keyword_link\" href=\"https:\/\/www.ameeba.com\"   title=\"Intrusion Detection System\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"42645\">Intrusion Detection System<\/a> (IDS) could provide temporary mitigation. However, these are not long-term solutions and can only limit the potential impact of an exploit. The best protection against this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9523-critical-stack-based-buffer-overflow-vulnerability-in-tenda-ac1206\/\"  data-wpil-monitor-id=\"90997\">vulnerability is to update your Tenda<\/a> DAP-1520 to a version that has fixed this issue.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The vulnerability CVE-2025-4355 is a critical security flaw discovered in the Tenda DAP-1520, a popular networking device. The vulnerability resides within the &#8216;set_ws_action&#8217; function of the &#8216;\/dws\/api\/&#8217; file, leading to a heap-based buffer overflow. This vulnerability is especially serious as it allows a potential attacker to initiate the attack remotely, which could lead to [&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":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-37892","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-rce"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/37892","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=37892"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/37892\/revisions"}],"predecessor-version":[{"id":83959,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/37892\/revisions\/83959"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=37892"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=37892"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=37892"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=37892"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=37892"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=37892"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=37892"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=37892"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=37892"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}