{"id":38276,"date":"2025-05-15T03:55:07","date_gmt":"2025-05-15T03:55:07","guid":{"rendered":""},"modified":"2025-10-05T23:20:40","modified_gmt":"2025-10-06T05:20:40","slug":"cve-2025-45842-authenticated-stack-overflow-vulnerability-in-totolink-nr1800x","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-45842-authenticated-stack-overflow-vulnerability-in-totolink-nr1800x\/","title":{"rendered":"<strong>CVE-2025-45842: Authenticated Stack Overflow Vulnerability in TOTOLINK NR1800X<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical vulnerability, designated as CVE-2025-45842, has been discovered in the TOTOLINK NR1800X V9.1.0u.6681_B20230703. This vulnerability is due to an authenticated stack overflow that can be triggered through the ssid5g parameter in the setWiFiEasyCfg function. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-24977-critical-vulnerability-in-opencti-cyber-threat-intelligence-platform\/\"  data-wpil-monitor-id=\"42978\">vulnerability poses a considerable threat<\/a> to the integrity, availability, and confidentiality of the system. Entities that utilize the TOTOLINK NR1800X in their network infrastructure should be aware of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9364-critical-open-database-issue-resulting-in-potential-system-compromise\/\"  data-wpil-monitor-id=\"89080\">issue and take immediate action to mitigate its potential<\/a> impacts.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-45842<br \/>\nSeverity: Critical (8.8)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: Low<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4050-heap-corruption-in-google-chrome-devtools-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"43090\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-858125011\" 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>TOTOLINK NR1800X | V9.1.0u.6681_B20230703<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-38583-stack-based-buffer-overflow-vulnerability-in-gtkwave-3-3-115\/\"  data-wpil-monitor-id=\"43043\">vulnerability is an authenticated stack overflow<\/a>, exploitable via the ssid5g parameter in the setWiFiEasyCfg function. An attacker with network access and low-level <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47462-cross-site-request-forgery-vulnerability-in-ohidul-islam-challan-leading-to-privilege-escalation\/\"  data-wpil-monitor-id=\"43673\">privileges can send a specially crafted HTTP request<\/a> to the target device. This request would contain an overly long string in the ssid5g parameter, which would cause a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4096-remote-heap-buffer-overflow-vulnerability-in-google-chrome-html-processing\/\"  data-wpil-monitor-id=\"43123\">buffer overflow<\/a> in the stack. If successful, the overflow can lead to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-37446-arbitrary-code-execution-vulnerability-in-gtkwave-3-3-115\/\"  data-wpil-monitor-id=\"42953\">arbitrary code execution<\/a>, potentially resulting in a full system compromise or data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2547637625\" 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 is a conceptual example of how a malicious HTTP <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47533-cross-site-request-forgery-vulnerability-in-iqonic-design-graphina\/\"  data-wpil-monitor-id=\"44205\">request targeting this vulnerability<\/a> might look. This is a simplified representation and actual exploit code may vary significantly.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/setWiFiEasyCfg HTTP\/1.1\nHost: target_device_ip\nContent-Type: application\/x-www-form-urlencoded\nAuthorization: Basic base64_credentials\nssid5g=A*10000<\/code><\/pre>\n<p>In the above code block, `A*10000` represents a string of 10,000 &#8216;A&#8217; characters, which would exceed the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-49122-critical-heap-based-buffer-overflow-vulnerability-in-solid-edge-se2023\/\"  data-wpil-monitor-id=\"43381\">buffer limit and trigger the stack overflow<\/a>. The `base64_credentials` would be the Base64-encoded username and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31019-authentication-bypass-vulnerability-in-miniorange-password-policy-manager\/\"  data-wpil-monitor-id=\"60294\">password of an authenticated<\/a> user account on the target device.<\/p>\n<p><strong>Recommended Mitigation<\/strong><\/p>\n<p>The best course of action to mitigate 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=\"50015\">vulnerability is to apply the patch provided<\/a> by the vendor. If the patch is not yet available or cannot be applied immediately, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as temporary mitigation. These systems should be configured to block or alert on <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4827-critical-buffer-overflow-vulnerability-in-totolink-http-post-request-handler\/\"  data-wpil-monitor-id=\"50945\">HTTP requests<\/a> containing unusually large ssid5g parameter values.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical vulnerability, designated as CVE-2025-45842, has been discovered in the TOTOLINK NR1800X V9.1.0u.6681_B20230703. This vulnerability is due to an authenticated stack overflow that can be triggered through the ssid5g parameter in the setWiFiEasyCfg function. This vulnerability poses a considerable threat to the integrity, availability, and confidentiality of the system. Entities that utilize the [&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":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-38276","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-rce"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/38276","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=38276"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/38276\/revisions"}],"predecessor-version":[{"id":81901,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/38276\/revisions\/81901"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=38276"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=38276"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=38276"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=38276"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=38276"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=38276"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=38276"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=38276"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=38276"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}