{"id":70809,"date":"2025-09-03T19:39:55","date_gmt":"2025-09-03T19:39:55","guid":{"rendered":""},"modified":"2025-09-27T17:53:09","modified_gmt":"2025-09-27T23:53:09","slug":"cve-2025-9527-remote-stack-based-buffer-overflow-vulnerability-in-linksys-e1700-routers","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-9527-remote-stack-based-buffer-overflow-vulnerability-in-linksys-e1700-routers\/","title":{"rendered":"<strong>CVE-2025-9527: Remote Stack-based Buffer Overflow Vulnerability in Linksys E1700 Routers<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The vulnerability identified as CVE-2025-9527 is a severe flaw in the Linksys E1700 1.0.0.4.003 router, primarily affecting the QoSSetup function. This vulnerability is of significant concern as it exposes the system to remote attacks, enabling potential unauthorized access, system compromise, and data leakage. The exploit has been made public, indicating that any <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8714-critical-postgresql-vulnerability-allowing-malicious-code-injection-by-superusers\/\"  data-wpil-monitor-id=\"80770\">malicious actor with knowledge of the vulnerability<\/a> can exploit it, escalating the urgency of immediate mitigation.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-9527<br \/>\nSeverity: High (8.8 CVSS Score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54145-firefox-ios-qr-scanner-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"78752\">Potential system<\/a> compromise and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3182691276\" 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>Linksys E1700 | 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=\"78720\">vulnerability resides in the QoSSetup function of the file<\/a> \/goform\/QoSSetup. It arises <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-2413-bypassing-authentication-in-akinsoft-prokuafor-due-to-improper-restriction-of-excessive-authentication-attempts\/\"  data-wpil-monitor-id=\"85791\">due to improper<\/a> handling of the &#8216;ack_policy&#8217; argument. By manipulating this argument, an attacker can cause a stack-based <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=\"78444\">buffer overflow<\/a>. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30405-executorch-integer-overflow-vulnerability-could-lead-to-system-compromise\/\"  data-wpil-monitor-id=\"78707\">overflow can lead<\/a> to arbitrary code execution, thus allowing the attacker to compromise the system remotely.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3014393685\" 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 conceptual example demonstrates how an attacker might exploit this vulnerability. This pseudocode represents a malicious HTTP <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52797-critical-cross-site-request-forgery-csrf-vulnerability-in-josepsitjar-storymap\/\"  data-wpil-monitor-id=\"79377\">request to the vulnerable<\/a> endpoint:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/goform\/QoSSetup HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nack_policy=AAAA...[long string of &quot;A&quot;s to trigger the buffer overflow]<\/code><\/pre>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>Affected users are strongly advised to apply the vendor patch as soon as it is available. Until then, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary mitigation measure to detect and block <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-7457-macos-authorization-model-exploit-leading-to-potential-mitm-attacks\/\"  data-wpil-monitor-id=\"79963\">potential exploitation<\/a> attempts.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The vulnerability identified as CVE-2025-9527 is a severe flaw in the Linksys E1700 1.0.0.4.003 router, primarily affecting the QoSSetup function. This vulnerability is of significant concern as it exposes the system to remote attacks, enabling potential unauthorized access, system compromise, and data leakage. The exploit has been made public, indicating that any malicious actor [&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-70809","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\/70809","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=70809"}],"version-history":[{"count":8,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/70809\/revisions"}],"predecessor-version":[{"id":78590,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/70809\/revisions\/78590"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=70809"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=70809"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=70809"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=70809"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=70809"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=70809"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=70809"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=70809"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=70809"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}