{"id":36153,"date":"2025-05-07T20:37:28","date_gmt":"2025-05-07T20:37:28","guid":{"rendered":""},"modified":"2025-09-08T04:18:57","modified_gmt":"2025-09-08T10:18:57","slug":"cve-2025-4148-critical-buffer-overflow-vulnerability-in-netgear-ex6200","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4148-critical-buffer-overflow-vulnerability-in-netgear-ex6200\/","title":{"rendered":"<strong>CVE-2025-4148: Critical Buffer Overflow Vulnerability in Netgear EX6200<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical vulnerability has been discovered in the Netgear EX6200, firmware version 1.0.3.94. This vulnerability has been identified and classified as CVE-2025-4148, presenting a severe risk to the integrity and security of affected systems. The issue resides within the `sub_503FC` function, where an incorrect handling of the &#8216;host&#8217; argument may lead to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3785-critical-buffer-overflow-vulnerability-in-d-link-dwr-m961\/\"  data-wpil-monitor-id=\"40996\">buffer overflow<\/a>. Due to the nature of this vulnerability, the potential for unauthorized <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2021-42028-critical-vulnerability-in-syngo-fastview-allowing-remote-code-execution\/\"  data-wpil-monitor-id=\"40871\">remote access and execution of arbitrary code<\/a> is a notable concern, posing a genuine risk to user data and system stability.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-4148<br \/>\nSeverity: Critical (CVSS 8.8)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2021-40367-critical-vulnerability-in-syngo-fastview-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"40923\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1511064037\" 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-2025-4141-critical-buffer-overflow-vulnerability-in-netgear-ex6200-1-0-3-94\/\"  data-wpil-monitor-id=\"42308\">Netgear EX6200<\/a> | 1.0.3.94<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <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=\"80413\">vulnerability originates from the `sub_503FC` function<\/a>, specifically the manipulation of the &#8216;host&#8217; argument. When this argument is handled incorrectly, it leads to a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-34325-buffer-overflow-vulnerability-in-libfsimage\/\"  data-wpil-monitor-id=\"41016\">buffer overflow<\/a> condition. This condition occurs when more <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31263-critical-memory-handling-vulnerability-could-lead-to-system-compromise-or-data-leakage-in-macos-sequoia-15-4\/\"  data-wpil-monitor-id=\"57033\">data is written to a buffer than it can hold, causing the excess data to overflow into adjacent memory<\/a> locations. This can corrupt data, crash the system, or lead to the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46616-arbitrary-remote-code-execution-vulnerability-in-quantum-stornext-web-gui-api\/\"  data-wpil-monitor-id=\"40879\">execution of malicious code<\/a>. In this case, the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-20654-microsoft-odbc-driver-remote-code-execution-vulnerability-a-high-level-threat\/\"  data-wpil-monitor-id=\"41336\">vulnerability can be exploited remotely<\/a>, making it particularly dangerous.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2714003951\" 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 is a conceptual example of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47154-exploitation-of-use-after-free-vulnerability-in-libjs-in-ladybird\/\"  data-wpil-monitor-id=\"57036\">vulnerability might be exploited<\/a>. In this case, a malicious payload is sent to a vulnerable endpoint, which could cause a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-35702-stack-based-buffer-overflow-vulnerability-in-gtkwave-3-3-115\/\"  data-wpil-monitor-id=\"41070\">buffer overflow<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/vulnerable\/sub_503FC HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ &quot;host&quot;: &quot;AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...&quot; }<\/code><\/pre>\n<p>In this example, &#8220;A&#8221; represents an arbitrary character, and the string <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-44952-buffer-overflow-vulnerability-in-pfcp-library-of-open5gs-due-to-missing-length-check\/\"  data-wpil-monitor-id=\"78373\">length exceeds the buffer<\/a> capacity, causing it to overflow. This is a simplified representation of an attack; a real-world exploit would likely involve carefully crafted input designed to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3641-remote-code-execution-risk-in-moodle-lms-dropbox-repository\/\"  data-wpil-monitor-id=\"41456\">execute malicious code<\/a> or disrupt system operation.<\/p>\n<p><strong>Mitigation Guidelines<\/strong><\/p>\n<p>The ideal mitigation for this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49002-critical-vulnerability-in-dataease-bypassing-patch-for-cve-2025-32966\/\"  data-wpil-monitor-id=\"78374\">vulnerability would be to apply a vendor-supplied patch<\/a>. However, as of the time of writing, the vendor has not responded to this disclosure. In the absence of a vendor patch, implementing a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) could serve as a temporary mitigation <a href=\"https:\/\/www.ameeba.com\/blog\/hungarian-government-s-cybersecurity-measures-unpacking-the-implications-and-potential-solutions\/\"  data-wpil-monitor-id=\"57034\">measure by monitoring and potentially<\/a> blocking malicious traffic. Regular system and software updates, along with robust <a href=\"https:\/\/www.ameeba.com\/blog\/building-a-cybersecurity-program-legal-compliance-and-practical-strategies\/\"  data-wpil-monitor-id=\"57035\">cybersecurity practices<\/a>, are also essential in preventing successful exploits.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical vulnerability has been discovered in the Netgear EX6200, firmware version 1.0.3.94. This vulnerability has been identified and classified as CVE-2025-4148, presenting a severe risk to the integrity and security of affected systems. The issue resides within the `sub_503FC` function, where an incorrect handling of the &#8216;host&#8217; argument may lead to buffer overflow. [&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-36153","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\/36153","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=36153"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/36153\/revisions"}],"predecessor-version":[{"id":72835,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/36153\/revisions\/72835"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=36153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=36153"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=36153"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=36153"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=36153"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=36153"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=36153"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=36153"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=36153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}