{"id":33266,"date":"2025-04-28T21:50:59","date_gmt":"2025-04-28T21:50:59","guid":{"rendered":""},"modified":"2025-05-14T05:21:01","modified_gmt":"2025-05-14T05:21:01","slug":"cve-2025-28035-pre-auth-remote-command-execution-vulnerability-in-totolink-a830r","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-28035-pre-auth-remote-command-execution-vulnerability-in-totolink-a830r\/","title":{"rendered":"<strong>CVE-2025-28035: Pre-Auth Remote Command Execution Vulnerability in TOTOLINK A830R<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The cybersecurity landscape is continuously evolving with new threats emerging daily. One such security threat that has recently been identified is the CVE-2025-28035 vulnerability associated with TOTOLINK A830R V4.1.2cu.5182_B20201102. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-53303-remote-code-execution-vulnerability-in-lrqa-nettitude-poshc2\/\"  data-wpil-monitor-id=\"38059\">vulnerability is particularly threatening due to its pre-auth remote command<\/a> execution nature via the setNoticeCfg function, which is processed through the NoticeUrl parameter. This implies that an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3200-unauthenticated-remote-attacker-exploiting-insecure-tls-protocols\/\"  data-wpil-monitor-id=\"40768\">attacker does not need authentication to exploit<\/a> the system, making it an especially severe security concern.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-28035<br \/>\nSeverity: Critical (9.8 CVSS Score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29905-sql-injection-vulnerability-in-telecontrol-server-basic-potentially-compromising-entire-systems\/\"  data-wpil-monitor-id=\"38145\">Potential system compromise<\/a> or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2467861173\" 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 A830R | V4.1.2cu.5182_B20201102<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28034-remote-command-execution-vulnerability-in-totolink-wireless-routers\/\"  data-wpil-monitor-id=\"39447\">vulnerability lies in the setNoticeCfg function in TOTOLINK<\/a> A830R V4.1.2cu.5182_B20201102. More specifically, it is in the NoticeUrl parameter. An attacker can exploit this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32958-critical-adept-language-vulnerability-allowing-malicious-code-execution\/\"  data-wpil-monitor-id=\"38247\">vulnerability by sending a malicious<\/a> request to this parameter. Since the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28039-pre-auth-remote-command-execution-vulnerability-in-totolink-ex1200t\/\"  data-wpil-monitor-id=\"39499\">vulnerability is pre-authentication<\/a>, the attacker does not need any user credentials or privileges. If successful, the attacker can remotely execute commands, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-28197-ssrf-vulnerability-in-crawl4ai-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"37939\">potentially leading to complete system<\/a> compromise or data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-830113010\" 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>Given the nature of the vulnerability, an exploit could look something like this:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/setNoticeCfg HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ &quot;NoticeUrl&quot;: &quot;1; \/bin\/sh -c &#039;command_here&#039;;&quot; }<\/code><\/pre>\n<p>In this example, the attacker is <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43858-command-injection-vulnerability-in-youtubedlsharp-library\/\"  data-wpil-monitor-id=\"40403\">injecting a command<\/a> (`command_here`) to be run on the server. The `1;` before the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29659-critical-remote-command-execution-vulnerability-in-yi-iot-xy-3820\/\"  data-wpil-monitor-id=\"38177\">command ensures that the command will execute regardless of the previous command&#8217;s<\/a> result.<\/p>\n<p><strong>Mitigation Advice<\/strong><\/p>\n<p>If you are using TOTOLINK A830R V4.1.2cu.5182_B20201102, it is advised to apply the vendor patch immediately to remediate this vulnerability. If a patch is not available or cannot be applied immediately, consider using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) as a temporary mitigation measure. However, these are just remedial <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46342-kyverno-policy-engine-vulnerability-enables-unauthorized-actions-in-kubernetes\/\"  data-wpil-monitor-id=\"42706\">actions and do not resolve the vulnerability<\/a>. Thus, applying the vendor patch at the earliest is strongly recommended.<br \/>\nAs always, stay vigilant and prioritize the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32953-security-vulnerability-in-z80pack-emulator-leading-to-system-compromise\/\"  data-wpil-monitor-id=\"40434\">security of your systems<\/a>. Regularly update your systems, use reliable security tools, and follow recommended <a href=\"https:\/\/www.ameeba.com\/blog\/ai-in-cybersecurity-a-new-era-of-protection-or-a-pandora-s-box\/\"  data-wpil-monitor-id=\"39839\">cybersecurity practices to minimize risks and protect<\/a> your assets.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The cybersecurity landscape is continuously evolving with new threats emerging daily. One such security threat that has recently been identified is the CVE-2025-28035 vulnerability associated with TOTOLINK A830R V4.1.2cu.5182_B20201102. This vulnerability is particularly threatening due to its pre-auth remote command execution nature via the setNoticeCfg function, which is processed through the NoticeUrl parameter. This [&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":[80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-33266","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-rce"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/33266","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=33266"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/33266\/revisions"}],"predecessor-version":[{"id":38002,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/33266\/revisions\/38002"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=33266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=33266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=33266"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=33266"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=33266"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=33266"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=33266"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=33266"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=33266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}