{"id":70734,"date":"2025-09-03T15:38:45","date_gmt":"2025-09-03T15:38:45","guid":{"rendered":""},"modified":"2025-09-29T02:50:20","modified_gmt":"2025-09-29T08:50:20","slug":"cve-2025-9526-stack-based-buffer-overflow-vulnerability-in-linksys-e1700","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-9526-stack-based-buffer-overflow-vulnerability-in-linksys-e1700\/","title":{"rendered":"<strong>CVE-2025-9526: Stack-Based Buffer Overflow Vulnerability in Linksys E1700<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical vulnerability, CVE-2025-9526, has been identified in the Linksys E1700 router, version 1.0.0.4.003. This vulnerability allows for a stack-based buffer overflow attack, which could potentially lead to a complete system compromise or data leakage. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43245-critical-downgrade-issue-affecting-multiple-macos-versions\/\"  data-wpil-monitor-id=\"81799\">issue affects<\/a> a broad range of users, specifically anyone using the affected version of the Linksys E1700 router. Given the role of routers in handling network traffic, the exploitation of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50870-incorrect-access-control-vulnerability-in-institute-of-current-students-1-0\/\"  data-wpil-monitor-id=\"79315\">vulnerability could provide attackers with significant control<\/a> over a network, which makes this a matter of high concern.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-9526<br \/>\nSeverity: High (8.8 CVSS Score)<br \/>\nAttack Vector: Remote<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: Potential <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50160-heap-based-buffer-overflow-in-windows-rras-posing-system-compromise-risk\/\"  data-wpil-monitor-id=\"78445\">system compromise<\/a> and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-4037809183\" 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-2025-9527-remote-stack-based-buffer-overflow-vulnerability-in-linksys-e1700-routers\/\"  data-wpil-monitor-id=\"88562\">Linksys E1700<\/a> | 1.0.0.4.003<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55746-unauthenticated-file-manipulation-vulnerability-in-directus\/\"  data-wpil-monitor-id=\"78721\">vulnerability lies within the &#8216;setSysAdm&#8217; function of the &#8216;\/goform\/setSysAdm&#8217; file<\/a>. The issue is caused by improper validation of user-supplied data, which can result in a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8833-critical-remote-stack-based-buffer-overflow-vulnerability-in-linksys-devices\/\"  data-wpil-monitor-id=\"78364\">stack-based buffer overflow<\/a> condition. An attacker may exploit this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9088-critical-buffer-overflow-vulnerability-in-tenda-ac20-16-03-08-12\/\"  data-wpil-monitor-id=\"78365\">vulnerability by manipulating the &#8216;rm_port&#8217; argument to trigger the overflow<\/a>. This can lead to the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-25278-local-arbitrary-code-execution-in-openharmony-v5-0-3-and-prior-versions\/\"  data-wpil-monitor-id=\"78358\">execution of arbitrary code<\/a> in the context of the affected application, making it possible for an attacker to gain control over the system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-18978502\" 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>Below is a conceptual example of how the vulnerability might be exploited. In this example, we&#8217;re manipulating the &#8216;rm_port&#8217; argument in an HTTP <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-24000-authentication-bypass-vulnerability-in-wpexperts-post-smtp-plugin\/\"  data-wpil-monitor-id=\"78968\">POST request to the vulnerable<\/a> endpoint:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/goform\/setSysAdm HTTP\/1.1\nHost: vulnerable-linksys-router\nContent-Type: application\/x-www-form-urlencoded\nrm_port=65537; \/\/This value is larger than expected, triggering the buffer overflow<\/code><\/pre>\n<p>This code sends a request to the vulnerable endpoint with a larger &#8216;rm_port&#8217; value than expected, which can trigger the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29365-buffer-overflow-vulnerability-in-spimsimulator-spim-v9-1-24-and-earlier\/\"  data-wpil-monitor-id=\"78366\">buffer overflow<\/a>. Note that this is a conceptual example; the precise payload would depend on the specific system setup and desired outcome of the attack.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>Users are strongly advised to apply the vendor-supplied patch to fix this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54742-data-deserialization-vulnerability-in-wpevently-leading-to-possible-system-compromise\/\"  data-wpil-monitor-id=\"86430\">vulnerability as soon as possible<\/a>. If the patch is not available, temporary mitigation can be achieved by using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to detect and block <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46414-unlimited-pin-attempts-vulnerability-in-api\/\"  data-wpil-monitor-id=\"81209\">attempts to exploit this vulnerability<\/a>. However, these are not long-term solutions and the patch should be applied as soon as it becomes available.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical vulnerability, CVE-2025-9526, has been identified in the Linksys E1700 router, version 1.0.0.4.003. This vulnerability allows for a stack-based buffer overflow attack, which could potentially lead to a complete system compromise or data leakage. This issue affects a broad range of users, specifically anyone using the affected version of the Linksys E1700 router. [&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-70734","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\/70734","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=70734"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/70734\/revisions"}],"predecessor-version":[{"id":81371,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/70734\/revisions\/81371"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=70734"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=70734"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=70734"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=70734"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=70734"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=70734"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=70734"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=70734"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=70734"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}