{"id":67631,"date":"2025-08-30T02:00:02","date_gmt":"2025-08-30T02:00:02","guid":{"rendered":""},"modified":"2025-09-11T20:15:48","modified_gmt":"2025-09-12T02:15:48","slug":"cve-2025-29515-critical-access-control-vulnerability-in-d-link-dsl-7740c","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-29515-critical-access-control-vulnerability-in-d-link-dsl-7740c\/","title":{"rendered":"<strong>CVE-2025-29515: Critical Access Control Vulnerability in D-Link DSL-7740C<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>Recently, a critical vulnerability labeled CVE-2025-29515 was identified within the firmware of the D-Link DSL-7740C. This vulnerability pertains to incorrect access control in the DELT_file.xgi endpoint, which could potentially allow attackers to modify arbitrary settings within the device&#8217;s XML database. This includes the ability to modify the administrator&#8217;s password, which could <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27043-memory-corruption-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"75051\">lead to a complete system<\/a> compromise and data leakage.<br \/>\nThis <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43245-critical-downgrade-issue-affecting-multiple-macos-versions\/\"  data-wpil-monitor-id=\"81783\">issue primarily affects<\/a> users of the D-Link DSL-7740C with the specific firmware version DSL7740C.V6.TR069.20211230. Given the ubiquitous nature of D-Link products in both home and office environments, understanding and mitigating this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27046-critical-memory-corruption-vulnerability-threatening-system-integrity\/\"  data-wpil-monitor-id=\"75050\">vulnerability is of utmost importance to maintain system<\/a> integrity and protect sensitive information.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-29515<br \/>\nSeverity: Critical (9.8 CVSS)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: Complete <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50160-heap-based-buffer-overflow-in-windows-rras-posing-system-compromise-risk\/\"  data-wpil-monitor-id=\"78514\">system compromise<\/a>, potential data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-743730524\" 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-2025-29514-high-severity-access-control-vulnerability-in-d-link-dsl-7740c-router\/\"  data-wpil-monitor-id=\"83181\">D-Link DSL-7740C<\/a> | DSL7740C.V6.TR069.20211230<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability arises from insufficient <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30133-device-pairing-bypass-vulnerability-in-iroad-dashcam-fx2-devices\/\"  data-wpil-monitor-id=\"75645\">access control<\/a> on the DELT_file.xgi endpoint in the device&#8217;s firmware. This endpoint allows for modifications to the device&#8217;s XML database, which includes <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-41530-critical-sql-injection-vulnerability-in-hospital-management-system-v4\/\"  data-wpil-monitor-id=\"75914\">critical system<\/a> settings and user credentials.<br \/>\nAttackers can exploit this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-9408-server-side-request-forgery-attack-in-eclipse-glassfish\/\"  data-wpil-monitor-id=\"77268\">vulnerability<\/a> by sending specifically crafted HTTP requests to the endpoint. As there are no proper <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-57155-a-critical-access-control-vulnerability-in-radar-v1-0-8\/\"  data-wpil-monitor-id=\"76277\">access controls<\/a>, these requests are processed without verification, allowing for unauthorized changes to the system&#8217;s settings, including the modification of the administrator&#8217;s password.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-3575973751\" 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&#8217;s a conceptual example of how an attacker might exploit this vulnerability. This example uses an HTTP POST request to modify the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-51536-critical-hardcoded-administrator-password-vulnerability-in-ai-openatlas\/\"  data-wpil-monitor-id=\"76733\">administrator&#8217;s password<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/DELT_file.xgi HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/xml\n&lt;xml&gt;\n&lt;admin&gt;\n&lt;password&gt;new_password&lt;\/password&gt;\n&lt;\/admin&gt;\n&lt;\/xml&gt;<\/code><\/pre>\n<p>In this example, &#8220;new_password&#8221; would be the attacker&#8217;s chosen password. Once this request is processed by the vulnerable device, the administrator&#8217;s password would be changed, thus granting the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-25268-unauthenticated-adjacent-attacker-accessing-api-endpoint\/\"  data-wpil-monitor-id=\"77681\">attacker full access<\/a> to the system and its data.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview Recently, a critical vulnerability labeled CVE-2025-29515 was identified within the firmware of the D-Link DSL-7740C. This vulnerability pertains to incorrect access control in the DELT_file.xgi endpoint, which could potentially allow attackers to modify arbitrary settings within the device&#8217;s XML database. This includes the ability to modify the administrator&#8217;s password, which could lead to a [&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":[82],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-67631","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-microsoft"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/67631","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=67631"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/67631\/revisions"}],"predecessor-version":[{"id":75721,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/67631\/revisions\/75721"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=67631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=67631"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=67631"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=67631"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=67631"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=67631"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=67631"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=67631"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=67631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}