{"id":36020,"date":"2025-05-07T07:31:18","date_gmt":"2025-05-07T07:31:18","guid":{"rendered":""},"modified":"2025-08-31T18:37:57","modified_gmt":"2025-09-01T00:37:57","slug":"cve-2025-4139-critical-buffer-overflow-vulnerability-in-netgear-ex6120-1-0-0-68","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4139-critical-buffer-overflow-vulnerability-in-netgear-ex6120-1-0-0-68\/","title":{"rendered":"<strong>CVE-2025-4139: Critical Buffer Overflow Vulnerability in Netgear EX6120 1.0.0.68<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In our continuously evolving digital world, security vulnerabilities pose a significant threat to both individuals and businesses alike. One such recent discovery is the critical vulnerability identified in Netgear EX6120 1.0.0.68, a widely used network product. The vulnerability, classified as CVE-2025-4139, has been found in the fwAcosCgiInbound function and can lead to a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3785-critical-buffer-overflow-vulnerability-in-d-link-dwr-m961\/\"  data-wpil-monitor-id=\"41002\">buffer overflow<\/a>. This vulnerability has substantial implications, including <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2021-40367-critical-vulnerability-in-syngo-fastview-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"40928\">potential system<\/a> compromise and data leakage.<br \/>\nThe <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46661-unauthenticated-remote-code-execution-vulnerability-in-ipw-systems-metazo\/\"  data-wpil-monitor-id=\"40734\">vulnerability CVE-2025-4139 matters because it can be exploited remotely<\/a>, putting a vast number of systems at risk. Unfortunately, the vendor has been unresponsive to this disclosure, making immediate mitigation efforts crucial for all affected systems.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-4139<br \/>\nSeverity: Critical (8.8\/10 CVSS Score)<br \/>\nAttack Vector: Remote<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-34322-inadequate-precaution-in-xen-s-shadow-paging-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"40982\">System compromise and potential<\/a> data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3841926794\" 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-2025-4140-critical-remote-buffer-overflow-vulnerability-in-netgear-ex6120-1-0-3-94\/\"  data-wpil-monitor-id=\"42295\">Netgear EX6120<\/a> | 1.0.0.68<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit works by manipulating the &#8216;host&#8217; argument in the fwAcosCgiInbound function of the Netgear EX6120 1.0.0.68. This manipulation allows a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-34325-buffer-overflow-vulnerability-in-libfsimage\/\"  data-wpil-monitor-id=\"41022\">buffer overflow<\/a> to occur. 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=\"41072\">buffer overflow<\/a> is a situation where more data is written into a fixed-length buffer than the buffer can handle. This overflow in memory can overwrite adjacent memory locations and cause unpredictable system behavior, including crashes, incorrect execution, and most critically, the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45947-arbitrarily-executable-code-vulnerability-in-online-banquet-booking-system-v1-2\/\"  data-wpil-monitor-id=\"40830\">execution of malicious code<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2434009967\" 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 illustrating 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=\"49210\">vulnerability might be exploited<\/a>. This is a sample HTTP request that includes a malicious payload designed to trigger the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3991-critical-buffer-overflow-vulnerability-in-totolink-n150rt-3-4-0-b20190525\/\"  data-wpil-monitor-id=\"41078\">buffer overflow<\/a>.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/fwAcosCgiInbound HTTP\/1.1\nHost: vulnerable-router.example.com\nContent-Type: application\/json\n{ &quot;host&quot;: &quot;...&quot; } \/\/ Insert malicious payload here that overflows the buffer<\/code><\/pre>\n<p>It should be noted that this is a conceptual example. Real-world exploits may be more complex and require deeper understanding of the system&#8217;s internals.<\/p>\n<p><strong>Countermeasures and Mitigation<\/strong><\/p>\n<p>Until the vendor releases a patch, it&#8217;s advisable to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation method. These measures can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-20217-denial-of-service-vulnerability-in-snort-3-detection-engine-of-cisco-secure-firewall-threat-defense-software\/\"  data-wpil-monitor-id=\"77025\">detect and prevent the exploitation of the vulnerability<\/a>. It is always important to keep systems up to date with the <a href=\"https:\/\/www.ameeba.com\/blog\/ai-cybersecurity-firm-cloudsek-secures-usd-19-mn-in-latest-funding-round\/\"  data-wpil-monitor-id=\"49209\">latest security<\/a> patches and updates to ensure maximum protection against such threats.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In our continuously evolving digital world, security vulnerabilities pose a significant threat to both individuals and businesses alike. One such recent discovery is the critical vulnerability identified in Netgear EX6120 1.0.0.68, a widely used network product. The vulnerability, classified as CVE-2025-4139, has been found in the fwAcosCgiInbound function and can lead to a buffer [&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-36020","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\/36020","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=36020"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/36020\/revisions"}],"predecessor-version":[{"id":69418,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/36020\/revisions\/69418"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=36020"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=36020"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=36020"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=36020"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=36020"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=36020"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=36020"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=36020"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=36020"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}