{"id":69810,"date":"2025-09-02T07:26:28","date_gmt":"2025-09-02T07:26:28","guid":{"rendered":""},"modified":"2025-09-10T15:48:34","modified_gmt":"2025-09-10T21:48:34","slug":"cve-2025-9393-critical-buffer-overflow-vulnerability-in-linksys-wifi-extenders","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-9393-critical-buffer-overflow-vulnerability-in-linksys-wifi-extenders\/","title":{"rendered":"<strong>CVE-2025-9393: Critical Buffer Overflow Vulnerability in Linksys WiFi Extenders<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The cybersecurity landscape is no stranger to vulnerabilities that can threaten the integrity of our digital systems. One such critical vulnerability, identified as CVE-2025-9393, has been discovered in several Linksys WiFi Extender models. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8817-critical-stack-based-buffer-overflow-vulnerability-in-linksys-devices\/\"  data-wpil-monitor-id=\"77781\">vulnerability is particularly concerning as Linksys<\/a> is a commonly used brand in both domestic and corporate settings. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53145-type-confusion-vulnerability-in-windows-message-queuing-allowing-remote-code-execution\/\"  data-wpil-monitor-id=\"78196\">vulnerability in the Extenders could potentially allow<\/a> an attacker to compromise the system or leak sensitive data, underscoring the criticality of addressing this issue swiftly and effectively.<br \/>\nWith the exploitation of this vulnerability now public and the vendor&#8217;s lack of response, it becomes critical for users and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-51991-server-side-template-injection-vulnerability-in-xwiki-s-administration-interface\/\"  data-wpil-monitor-id=\"81398\">administrators to understand the nature of this vulnerability<\/a>, its implications, and the potential mitigation strategies that can be employed to safeguard against potential threats.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-9393<br \/>\nSeverity: Critical, CVSS Score 8.8<br \/>\nAttack Vector: Remote<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-42950-sap-landscape-transformation-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"77550\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-173477434\" 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>Linksys RE6250 | 1.0.013.001, 1.0.04.001, 1.0.04.002, 1.1.05.003, 1.2.07.001<br \/>\nLinksys RE6300 | 1.0.013.001, 1.0.04.001, 1.0.04.002, 1.1.05.003, 1.2.07.001<br \/>\n&#8230; and so on for other products<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The identified <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55746-unauthenticated-file-manipulation-vulnerability-in-directus\/\"  data-wpil-monitor-id=\"78731\">vulnerability resides in the addStaProfile function of the file<\/a> \/goform\/addStaProfile. An attacker can exploit this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49661-untrusted-pointer-dereference-vulnerability-in-windows-ancillary-function-driver-for-winsock\/\"  data-wpil-monitor-id=\"80373\">vulnerability by sending a manipulated argument to the function<\/a>. This manipulation can result in a stack-based <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54878-heap-buffer-overflow-vulnerability-in-nasa-cryptolib\/\"  data-wpil-monitor-id=\"77476\">buffer overflow<\/a>, which can lead to unexpected behaviors including potential system crashes or, in worst-case scenarios, arbitrary code execution.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1090412438\" 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>Here&#8217;s a conceptual example of a crafted 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=\"79343\">request that might exploit this vulnerability<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/goform\/addStaProfile HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nprofile_name=VALID&amp;ssid=VALID&amp;wep_key_1=VALID&amp;wep_key_2=VALID&amp;wep_key_3=VALID&amp;wep_key_4=BUFFER_OVERFLOW_PAYLOAD<\/code><\/pre>\n<p>In this example, the &#8220;BUFFER_OVERFLOW_PAYLOAD&#8221; is a malicious payload designed to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-21165-out-of-bounds-write-vulnerability-in-substance3d-designer-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"77441\">overflow the buffer<\/a> and potentially allow the attacker to execute arbitrary code or crash the system.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>Given the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54952-severe-integer-overflow-vulnerability-in-executorch-models\/\"  data-wpil-monitor-id=\"78400\">severity of this vulnerability<\/a> and the lack of response from the vendor, it is recommended to apply any available vendor patches as soon as possible. In the absence of a vendor-supplied patch, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to block or detect <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46414-unlimited-pin-attempts-vulnerability-in-api\/\"  data-wpil-monitor-id=\"81218\">attempts to exploit this vulnerability<\/a> can serve as a temporary mitigation strategy.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The cybersecurity landscape is no stranger to vulnerabilities that can threaten the integrity of our digital systems. One such critical vulnerability, identified as CVE-2025-9393, has been discovered in several Linksys WiFi Extender models. This vulnerability is particularly concerning as Linksys is a commonly used brand in both domestic and corporate settings. This vulnerability in [&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-69810","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\/69810","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=69810"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/69810\/revisions"}],"predecessor-version":[{"id":73850,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/69810\/revisions\/73850"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=69810"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=69810"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=69810"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=69810"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=69810"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=69810"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=69810"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=69810"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=69810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}