{"id":35876,"date":"2025-05-07T05:30:26","date_gmt":"2025-05-07T05:30:26","guid":{"rendered":""},"modified":"2025-09-10T12:50:06","modified_gmt":"2025-09-10T18:50:06","slug":"cve-2025-4120-critical-buffer-overflow-vulnerability-in-netgear-jwnr2000v2-1-0-0-11","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4120-critical-buffer-overflow-vulnerability-in-netgear-jwnr2000v2-1-0-0-11\/","title":{"rendered":"<strong>CVE-2025-4120: Critical Buffer Overflow Vulnerability in Netgear JWNR2000v2 1.0.0.11<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A severe vulnerability has been unearthed in the firmware of the Netgear JWNR2000v2 1.0.0.11. This vulnerability is critically classified and has been assigned the identifier CVE-2025-4120. With this exploit, cyber attackers can manipulate the host argument to cause a buffer overflow, leading to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3914-potential-arbitrary-file-uploads-and-system-compromise-in-aeropage-sync-for-airtable-wordpress-plugin\/\"  data-wpil-monitor-id=\"40594\">potential system compromise<\/a> or data leakage. This vulnerability is of particular concern due to the possibility of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3200-unauthenticated-remote-attacker-exploiting-insecure-tls-protocols\/\"  data-wpil-monitor-id=\"40776\">remote attack<\/a>, and the lack of response from the vendor despite early contact about the issue.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-4120<br \/>\nSeverity: Critical (8.8 CVSS Severity Score)<br \/>\nAttack Vector: Remote<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=\"40929\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2770976638\" 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-2025-4116-critical-buffer-overflow-vulnerability-in-netgear-jwnr2000v2-1-0-0-11\/\"  data-wpil-monitor-id=\"42212\">Netgear JWNR2000v2<\/a> | 1.0.0.11<\/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=\"80414\">vulnerability lies in the function<\/a> sub_4238E8 of the firmware. By manipulating the host argument within this function, an attacker can cause a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3785-critical-buffer-overflow-vulnerability-in-d-link-dwr-m961\/\"  data-wpil-monitor-id=\"41003\">buffer overflow<\/a>. This means that the attacker can overwrite the data in memory, causing the system to crash or <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-20229-remote-code-execution-vulnerability-in-splunk-enterprise-and-cloud-platforms\/\"  data-wpil-monitor-id=\"40688\">execute arbitrary code<\/a>. This can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28169-unencrypted-broadcasts-lead-to-potential-man-in-the-middle-attacks-on-byd-qin-plus-dm-i-dilink-os\/\"  data-wpil-monitor-id=\"40632\">lead to potential<\/a> system compromise, allowing the attacker to gain unauthorized access to data and resources.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3113213505\" 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 <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-23394-critical-unix-symbolic-link-following-vulnerability-in-opensuse-tumbleweed-cyrus-imapd\/\"  data-wpil-monitor-id=\"54405\">following is a conceptual example of how the vulnerability<\/a> might be exploited. In this example, an HTTP POST request is sent to a vulnerable endpoint with a manipulated host argument, causing a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-34325-buffer-overflow-vulnerability-in-libfsimage\/\"  data-wpil-monitor-id=\"41023\">buffer overflow<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/sub_4238E8 HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nhost=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA<\/code><\/pre>\n<p>In this conceptual example, &#8216;A&#8217; is used as a placeholder for the malicious payload.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>Until the vendor provides a patch for this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45427-critical-stack-overflow-vulnerability-in-tenda-ac9-v1-0-firmware\/\"  data-wpil-monitor-id=\"40558\">critical vulnerability<\/a>, it is strongly recommended to use a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) as temporary mitigation. These measures can help detect and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-35989-integer-overflow-vulnerability-in-gtkwave-s-lxt2-zlib-block-allocation\/\"  data-wpil-monitor-id=\"41941\">block attempts to exploit this vulnerability<\/a>. Users and administrators should also consider disconnecting the affected device from the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55293-high-risk-vulnerability-in-meshtastic-s-mesh-networking-solution\/\"  data-wpil-monitor-id=\"81349\">network until a patch is available to reduce the risk<\/a> of compromise.<br \/>\nKeep in mind that this is only a temporary solution. The ultimate resolution will be a vendor-supplied patch. Always keep your systems and devices updated with the latest software <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-7224-openvpn-connect-vulnerability-in-macos-versions-3-0-to-3-4-6\/\"  data-wpil-monitor-id=\"41191\">versions and security patches to protect against such vulnerabilities<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A severe vulnerability has been unearthed in the firmware of the Netgear JWNR2000v2 1.0.0.11. This vulnerability is critically classified and has been assigned the identifier CVE-2025-4120. With this exploit, cyber attackers can manipulate the host argument to cause a buffer overflow, leading to potential system compromise or data leakage. This vulnerability is of particular [&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-35876","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\/35876","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=35876"}],"version-history":[{"count":14,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/35876\/revisions"}],"predecessor-version":[{"id":73798,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/35876\/revisions\/73798"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=35876"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=35876"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=35876"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=35876"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=35876"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=35876"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=35876"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=35876"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=35876"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}