{"id":38612,"date":"2025-05-16T03:06:10","date_gmt":"2025-05-16T03:06:10","guid":{"rendered":""},"modified":"2025-07-06T05:20:57","modified_gmt":"2025-07-06T11:20:57","slug":"cve-2025-4451-critical-buffer-overflow-vulnerability-in-d-link-dir-619l","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4451-critical-buffer-overflow-vulnerability-in-d-link-dir-619l\/","title":{"rendered":"<strong>CVE-2025-4451: Critical Buffer Overflow Vulnerability in D-Link DIR-619L<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The Common Vulnerability and Exposure (CVE) system has recently identified a severe security flaw in the D-Link DIR-619L routers, specifically version 2.04B04. This vulnerability, designated as CVE-2025-4451, has been classified as critical due to its potential for system compromise or data leakage. The affected function, formSetWAN_Wizard52, can be <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48466-remote-manipulation-of-digital-outputs-via-modbus-tcp-packets\/\"  data-wpil-monitor-id=\"64283\">manipulated remotely<\/a>, posing a significant risk to users of the outdated firmware. This issue underscores the importance of maintaining up-to-date hardware and software as a first line of defense against <a href=\"https:\/\/www.ameeba.com\/blog\/unmasking-cyber-threats-us-enterprises-face-increasing-security-breaches-despite-heavy-investment\/\"  data-wpil-monitor-id=\"50011\">cyber threats<\/a>.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-4451<br \/>\nSeverity: Critical (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-2023-49126-critical-vulnerability-in-solid-edge-se2023-allows-for-potential-system-compromise\/\"  data-wpil-monitor-id=\"43418\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1060273421\" 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-2025-4452-critical-buffer-overflow-vulnerability-in-d-link-dir-619l-2-04b04\/\"  data-wpil-monitor-id=\"45248\">D-Link DIR-619L<\/a> | 2.04B04<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4342-critical-buffer-overflow-vulnerability-in-d-link-dir-600l\/\"  data-wpil-monitor-id=\"43479\">vulnerability is located in the formSetWAN_Wizard52 function of D-Link<\/a> DIR-619L 2.04B04. An attacker can trigger a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-49122-critical-heap-based-buffer-overflow-vulnerability-in-solid-edge-se2023\/\"  data-wpil-monitor-id=\"43366\">buffer overflow<\/a> by manipulating the &#8216;curTime&#8217; argument in the function call. Buffer <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-39273-critical-integer-overflow-vulnerabilities-in-gtkwave-s-lxt2-facgeometry-parsing-function\/\"  data-wpil-monitor-id=\"43268\">overflow vulnerabilities<\/a> occur when a program writes more data to a fixed-length block of memory, or buffer, than it can hold. The extra data can overwrite adjacent memory, leading to erratic program behavior, crashes, or even the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-37577-code-execution-vulnerability-in-gtkwave-3-3-115\/\"  data-wpil-monitor-id=\"43266\">execution of malicious code<\/a>. In this case, an attacker could leverage the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-49129-stack-overflow-vulnerability-in-solid-edge-se2023-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"43507\">overflow to gain control over the system<\/a> or extract sensitive data.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2015340436\" 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>While we do not have the exact code, an example of how this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47884-jenkins-openid-connect-provider-plugin-vulnerability-leading-to-unauthorized-access\/\"  data-wpil-monitor-id=\"50010\">vulnerability might be exploited is provided<\/a> below. In this hypothetical scenario, an attacker sends a specially crafted <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4827-critical-buffer-overflow-vulnerability-in-totolink-http-post-request-handler\/\"  data-wpil-monitor-id=\"50926\">HTTP request<\/a> to the router&#8217;s WAN settings page, overloading the buffer with an excessive &#8216;curTime&#8217; value.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/formSetWAN_Wizard52 HTTP\/1.1\nHost: target_router_ip\nContent-Type: application\/json\n{ &quot;curTime&quot;: &quot;A long string of text to trigger a buffer overflow...&quot; }<\/code><\/pre>\n<p>The above is a conceptual example and may not reflect the exact method an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5353-local-authenticated-attacker-exploit-in-ivanti-workspace-control\/\"  data-wpil-monitor-id=\"64284\">attacker would use to exploit<\/a> this vulnerability. It is shared merely for illustrative and educational purposes.<br \/>\nPlease <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48911-improper-permission-assignment-vulnerability-in-note-sharing-modules\/\"  data-wpil-monitor-id=\"59446\">note that the vendor has been notified of this vulnerability<\/a>, and users are urged to apply the vendor patch or use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The Common Vulnerability and Exposure (CVE) system has recently identified a severe security flaw in the D-Link DIR-619L routers, specifically version 2.04B04. This vulnerability, designated as CVE-2025-4451, has been classified as critical due to its potential for system compromise or data leakage. The affected function, formSetWAN_Wizard52, can be manipulated remotely, posing a significant risk [&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-38612","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\/38612","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=38612"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/38612\/revisions"}],"predecessor-version":[{"id":57794,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/38612\/revisions\/57794"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=38612"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=38612"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=38612"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=38612"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=38612"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=38612"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=38612"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=38612"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=38612"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}