{"id":52850,"date":"2025-06-17T07:21:31","date_gmt":"2025-06-17T07:21:31","guid":{"rendered":""},"modified":"2025-09-02T21:31:44","modified_gmt":"2025-09-03T03:31:44","slug":"cve-2025-5902-critical-buffer-overflow-vulnerability-in-totolink-t10","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-5902-critical-buffer-overflow-vulnerability-in-totolink-t10\/","title":{"rendered":"<strong>CVE-2025-5902: Critical Buffer Overflow Vulnerability in TOTOLINK T10<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The cyber landscape is constantly evolving, with new vulnerabilities cropping up regularly. One such vulnerability that has become a cause of concern is the CVE-2025-5902, which affects TOTOLINK T10 routers. This critical flaw could potentially lead to system compromise or data leakage, affecting all <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3055-critical-arbitrary-file-deletion-vulnerability-in-wp-user-frontend-pro-plugin\/\"  data-wpil-monitor-id=\"59176\">users of the vulnerable<\/a> router version. Given its severity and how widespread these routers are, it&#8217;s crucial to understand the nature of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-39486-rankie-sql-injection-vulnerability-and-mitigation-measures\/\"  data-wpil-monitor-id=\"77746\">vulnerability and how to mitigate<\/a> it.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-5902<br \/>\nSeverity: Critical, CVSS Score 8.8<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31222-potential-privilege-elevation-and-system-compromise-vulnerability\/\"  data-wpil-monitor-id=\"59685\">Potential system compromise<\/a> or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1049909914\" 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-2025-5901-buffer-overflow-vulnerability-in-totolink-t10-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"60505\">TOTOLINK T10<\/a> | 4.1.8cu.5207<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3054-arbitrary-file-upload-vulnerability-in-wp-user-frontend-pro-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"59234\">vulnerability lies within the setUpgradeFW function of the \/cgi-bin\/cstecgi.cgi file<\/a>. Specifically, the issue arises from the manipulation of the &#8220;slaveIpList&#8221; argument, which leads to a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5624-critical-stack-based-buffer-overflow-vulnerability-in-d-link-dir-816-1-10cnb05\/\"  data-wpil-monitor-id=\"59216\">buffer overflow<\/a>. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5622-critical-buffer-overflow-vulnerability-in-d-link-dir-816-1-10cnb05\/\"  data-wpil-monitor-id=\"59259\">buffer overflow<\/a> may be exploited by a malicious actor to execute arbitrary code on the device, potentially leading to system compromise or data leakage. The exploit can be initiated remotely, meaning that an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-25268-unauthenticated-adjacent-attacker-accessing-api-endpoint\/\"  data-wpil-monitor-id=\"77745\">attacker doesn&#8217;t need physical access<\/a> to the device to carry out the attack.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2413807353\" 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 the vulnerability might be exploited:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/cgi-bin\/cstecgi.cgi HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{\n&quot;slaveIpList&quot;: &quot;A string longer than the buffer that causes an overflow...&quot;\n}<\/code><\/pre>\n<p>In this example, the &#8220;slaveIpList&#8221; argument is filled with a string that&#8217;s longer than the buffer can handle, causing it to overflow. This overflow can then be used to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-1329-local-user-arbitrary-code-execution-vulnerability-in-ibm-cics-tx\/\"  data-wpil-monitor-id=\"59382\">execute arbitrary code<\/a>.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>The best way to protect your <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3365-path-traversal-vulnerability-leading-to-system-compromise\/\"  data-wpil-monitor-id=\"59457\">systems from this vulnerability<\/a> is to apply the patch released by the vendor. If for some reason you are unable to apply the patch immediately, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can offer some temporary mitigation. These systems can help <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45984-critical-command-injection-vulnerability-detected-in-blink-routers\/\"  data-wpil-monitor-id=\"61378\">detect and block attempts to exploit this vulnerability<\/a> until the patch can be applied.<br \/>\nIn the long term, it&#8217;s essential to keep your <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-21475-critical-memory-corruption-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"59914\">systems updated and patched against known vulnerabilities<\/a>. Regular security audits can also help identify and mitigate <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31259-vulnerability-in-macos-sequoia-allowing-for-potential-privilege-escalation\/\"  data-wpil-monitor-id=\"59724\">potential vulnerabilities<\/a> before they can be exploited.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The cyber landscape is constantly evolving, with new vulnerabilities cropping up regularly. One such vulnerability that has become a cause of concern is the CVE-2025-5902, which affects TOTOLINK T10 routers. This critical flaw could potentially lead to system compromise or data leakage, affecting all users of the vulnerable router version. Given its severity and [&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-52850","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\/52850","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=52850"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/52850\/revisions"}],"predecessor-version":[{"id":70143,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/52850\/revisions\/70143"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=52850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=52850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=52850"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=52850"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=52850"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=52850"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=52850"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=52850"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=52850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}