{"id":64249,"date":"2025-08-22T22:26:04","date_gmt":"2025-08-22T22:26:04","guid":{"rendered":""},"modified":"2025-10-21T17:37:20","modified_gmt":"2025-10-21T23:37:20","slug":"cve-2025-9088-critical-buffer-overflow-vulnerability-in-tenda-ac20-16-03-08-12","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-9088-critical-buffer-overflow-vulnerability-in-tenda-ac20-16-03-08-12\/","title":{"rendered":"<strong>CVE-2025-9088: Critical Buffer Overflow Vulnerability in Tenda AC20 16.03.08.12<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The digital ecosystem is constantly evolving, and with this evolution comes an ever-increasing need for tight security measures. A recent vulnerability, identified as CVE-2025-9088, has been found in the Tenda AC20 16.03.08.12. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-24777-deserialization-of-untrusted-data-vulnerability-in-awethemes-hillter\/\"  data-wpil-monitor-id=\"73007\">vulnerability exposes users to a potential system compromise or data<\/a> leakage. It affects the function save_virtualser_data of the file \/goform\/formSetVirtualSer, leading to a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8184-critical-stack-based-buffer-overflow-vulnerability-in-d-link-dir-513\/\"  data-wpil-monitor-id=\"71759\">stack-based buffer overflow<\/a>. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-24000-authentication-bypass-vulnerability-in-wpexperts-post-smtp-plugin\/\"  data-wpil-monitor-id=\"78980\">post seeks to delve into the details of this vulnerability<\/a>, its potential impact, and ways to mitigate it.<br \/>\nThe <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-10057-remote-code-execution-vulnerability-in-wp-import-ultimate-csv-xml-importer-for-wordpress-plugin\/\"  data-wpil-monitor-id=\"90912\">importance of understanding this vulnerability<\/a> cannot be overstated. As it affects a common networking device, the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8810-critical-buffer-overflow-vulnerability-in-tenda-ac20-16-03-08-05\/\"  data-wpil-monitor-id=\"77797\">Tenda AC20<\/a>, it has the potential to impact thousands, if not millions, of users worldwide. It poses a significant threat to the integrity and confidentiality of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54788-sql-injection-vulnerability-in-suitecrm-leading-to-potential-system-compromise-or-data-leakage\/\"  data-wpil-monitor-id=\"80215\">data and systems<\/a> connected to these devices.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-9088<br \/>\nSeverity: Critical (8.8)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27055-memory-corruption-leads-to-potential-system-compromise-during-image-encoding\/\"  data-wpil-monitor-id=\"74287\">Potential system compromise<\/a> or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1936788132\" 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-2025-9087-stack-based-buffer-overflow-vulnerability-in-tenda-ac20-16-03-08-12\/\"  data-wpil-monitor-id=\"77807\">Tenda AC20<\/a> | 16.03.08.12<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47982-improper-input-validation-vulnerability-in-windows-storage-vsp-driver-leading-to-privilege-escalation\/\"  data-wpil-monitor-id=\"75548\">vulnerability stems from a lack of proper input validation<\/a> in the function save_virtualser_data of the file \/goform\/formSetVirtualSer. An attacker can manipulate the argument list, causing a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7463-critical-buffer-overflow-vulnerability-in-tenda-fh1201-1-2-0-14\/\"  data-wpil-monitor-id=\"71802\">buffer overflow<\/a>. A <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49691-heap-based-buffer-overflow-in-windows-media-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"72053\">buffer overflow is a common coding error that can lead<\/a> to arbitrary code execution. In this case, the attacker could execute malicious code remotely, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-30327-integer-overflow-vulnerability-in-incopy-leading-to-potential-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"73604\">leading to a potential<\/a> system compromise or data leakage.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-2626425310\" 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 the vulnerability might be exploited. This is not actual exploit code, but rather a simplified representation to illustrate the attack.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/goform\/formSetVirtualSer HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ &quot;arguments&quot;: &quot;A&quot;.repeat(1025) } \/\/ Exceeds the buffer size<\/code><\/pre>\n<p>In this example, the attacker sends a POST request with an overly long argument list, causing a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49674-windows-rras-heap-based-buffer-overflow-vulnerability\/\"  data-wpil-monitor-id=\"72322\">buffer overflow<\/a> in the save_virtualser_data function.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>Users are advised to apply the vendor patch as soon as it becomes available. In the interim, users can use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure. These tools can help to detect and block exploit attempts, reducing the risk of a successful attack.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The digital ecosystem is constantly evolving, and with this evolution comes an ever-increasing need for tight security measures. A recent vulnerability, identified as CVE-2025-9088, has been found in the Tenda AC20 16.03.08.12. This vulnerability exposes users to a potential system compromise or data leakage. It affects the function save_virtualser_data of the file \/goform\/formSetVirtualSer, leading [&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-64249","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\/64249","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=64249"}],"version-history":[{"count":13,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64249\/revisions"}],"predecessor-version":[{"id":83857,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64249\/revisions\/83857"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=64249"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=64249"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=64249"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=64249"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=64249"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=64249"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=64249"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=64249"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=64249"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}