{"id":53825,"date":"2025-06-20T19:56:33","date_gmt":"2025-06-20T19:56:33","guid":{"rendered":""},"modified":"2025-08-31T06:32:26","modified_gmt":"2025-08-31T12:32:26","slug":"cve-2025-6115-critical-buffer-overflow-vulnerability-in-d-link-dir-619l-2-06b01","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-6115-critical-buffer-overflow-vulnerability-in-d-link-dir-619l-2-06b01\/","title":{"rendered":"<strong>CVE-2025-6115: Critical Buffer Overflow Vulnerability in D-Link DIR-619L 2.06B01<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical vulnerability has been discovered in the D-Link DIR-619L 2.06B01, an older yet widely used router. This vulnerability, identified as CVE-2025-6115, lies in the form_macfilter function and can lead to a stack-based buffer overflow. The vulnerability is of particular concern because it can be exploited remotely and may <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49181-unauthorized-api-endpoint-access-leading-to-denial-of-service-and-data-leakage\/\"  data-wpil-monitor-id=\"61729\">lead to severe consequences such as system compromise or data<\/a> leakage. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5894-critical-missing-authorization-vulnerability-in-smart-parking-management-system\/\"  data-wpil-monitor-id=\"60144\">vulnerability is critical<\/a> due to its potential for widespread harm and the ease with which it can be exploited.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-6115<br \/>\nSeverity: Critical (8.8 CVSS)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5868-critical-vulnerability-in-rt-thread-leading-to-system-compromise-and-data-leakage\/\"  data-wpil-monitor-id=\"63890\">System compromise<\/a>, potential data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-675980755\" 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-2025-6114-critical-vulnerability-in-d-link-dir-619l-leading-to-stack-based-buffer-overflow\/\"  data-wpil-monitor-id=\"61648\">D-Link DIR-619L<\/a> | 2.06B01<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5969-critical-stack-based-buffer-overflow-vulnerability-in-d-link-dir-632-fw103b08\/\"  data-wpil-monitor-id=\"61110\">vulnerability in the D-Link<\/a> DIR-619L 2.06B01 router is related to the form_macfilter function. The manipulation of the argument mac_hostname_%d\/sched_name_%d can lead to a stack-based <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5875-critical-buffer-overflow-vulnerability-in-tp-link-technologies-tl-ipc544ep-w4\/\"  data-wpil-monitor-id=\"60132\">buffer overflow<\/a>. This kind of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5863-critical-stack-based-buffer-overflow-vulnerability-in-tenda-ac5\/\"  data-wpil-monitor-id=\"60155\">overflow<\/a> happens when a program writes more data to the buffer than it can handle, which can cause it to overwrite adjacent memory locations. A remote attacker could use this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27709-sql-injection-vulnerability-in-zohocorp-manageengine-adaudit-plus\/\"  data-wpil-monitor-id=\"60130\">vulnerability to inject<\/a> arbitrary code into the memory, which would then be executed whenever the compromised function is called.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1366942467\" 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>In a conceptual sense, an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5353-local-authenticated-attacker-exploit-in-ivanti-workspace-control\/\"  data-wpil-monitor-id=\"61111\">attacker might exploit<\/a> this vulnerability by sending a specially crafted HTTP request to the vulnerable router. This request might look something like this:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/form_macfilter HTTP\/1.1\nHost: vulnerable.router.ip\nContent-Type: application\/x-www-form-urlencoded\nmac_hostname_%d=some_valid_value&amp;sched_name_%d=AAAA...AAAA (long string of &#039;A&#039;s to cause buffer overflow)<\/code><\/pre>\n<p>In this example, the `sched_name_%d` parameter is filled with a long string of &#8216;A&#8217;s. This string is longer than the buffer can handle, causing it to overflow and allowing the attacker to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48123-critical-code-injection-vulnerability-in-holest-engineering-spreadsheet-price-changer-for-woocommerce-and-wp-e-commerce-light\/\"  data-wpil-monitor-id=\"60271\">inject and execute arbitrary code<\/a>.<\/p>\n<p><strong>Remediation<\/strong><\/p>\n<p>Given that the affected product is no longer supported by the vendor, the best course of action is to replace the affected routers with newer <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31052-deserialization-of-untrusted-data-vulnerability-in-the-fashion-model-agency-one-page-beauty-theme\/\"  data-wpil-monitor-id=\"60251\">models that are not vulnerable<\/a> to this exploit. However, as an interim measure, a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can be used to monitor for and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8059-critical-privilege-escalation-vulnerability-in-b-blocks-wordpress-plugin\/\"  data-wpil-monitor-id=\"76411\">block malicious traffic attempting to exploit this vulnerability<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical vulnerability has been discovered in the D-Link DIR-619L 2.06B01, an older yet widely used router. This vulnerability, identified as CVE-2025-6115, lies in the form_macfilter function and can lead to a stack-based buffer overflow. The vulnerability is of particular concern because it can be exploited remotely and may lead to severe consequences such [&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-53825","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\/53825","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=53825"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53825\/revisions"}],"predecessor-version":[{"id":68859,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/53825\/revisions\/68859"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=53825"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=53825"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=53825"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=53825"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=53825"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=53825"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=53825"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=53825"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=53825"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}