{"id":64085,"date":"2025-08-16T01:28:51","date_gmt":"2025-08-16T01:28:51","guid":{"rendered":""},"modified":"2025-08-31T18:01:10","modified_gmt":"2025-09-01T00:01:10","slug":"cve-2025-8833-critical-remote-stack-based-buffer-overflow-vulnerability-in-linksys-devices","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-8833-critical-remote-stack-based-buffer-overflow-vulnerability-in-linksys-devices\/","title":{"rendered":"<strong>CVE-2025-8833: Critical Remote Stack-based Buffer Overflow Vulnerability in Linksys Devices<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The cybersecurity landscape is riddled with threats that, if left unchecked, can lead to severe consequences. One such vulnerability that has recently come into the spotlight is CVE-2025-8833, a critical vulnerability plaguing various Linksys devices. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53546-high-severity-vulnerability-in-folo-s-github-workflow\/\"  data-wpil-monitor-id=\"73424\">vulnerability is notable due to its high severity<\/a> score and the potential system compromise or data leakage it could cause.<br \/>\nAffecting the function langSwitchBack of the file \/goform\/langSwitchBack in Linksys RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000 up to version 20250801, the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-44955-critical-vulnerability-in-ruckus-network-director-allows-jail-users-to-gain-root-access\/\"  data-wpil-monitor-id=\"75996\">vulnerability is a serious threat to users<\/a> and organizations using these devices. The issue lies in the manipulation of the argument langSelectionOnly, which leads 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=\"71744\">stack-based buffer overflow<\/a>. It is of utmost importance to understand the implications of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27046-critical-memory-corruption-vulnerability-threatening-system-integrity\/\"  data-wpil-monitor-id=\"75044\">vulnerability and take necessary actions to secure affected systems<\/a>.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-8833<br \/>\nSeverity: Critical (8.8 CVSS Score)<br \/>\nAttack Vector: Remote<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27050-memory-corruption-vulnerability-leading-to-potential-system-compromise-and-data-leakage\/\"  data-wpil-monitor-id=\"74931\">Potential system compromise or data<\/a> leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3036170045\" 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: 720px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 22px; font-weight: 600; display: flex; align-items: center; letter-spacing: -0.02em;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 10px;\">\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: 42px; height: 42px;\" \/>\r\n    <\/a>\r\n    Share secrets securely\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 14px; color: #d1d5db;\">\r\n    Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 18px; color: #a1a1aa;\">\r\n    Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 24px; color: #e4e4e7;\">\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Encrypted identity<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Private Spaces for organizations and teams<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 End-to-end encrypted chat, calls, files, and notes<\/li>\r\n    <li style=\"margin-bottom: 8px;\">\u2022 Sensitive AI work and protected collaboration<\/li>\r\n    <li>\u2022 Built for information that cannot leak<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px; color: #ffffff;\">\r\n    Our mission is to secure human work alongside AI.\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: 8px; font-weight: 500;\">\r\n      Download Ameeba\r\n    <\/a>\r\n\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 8px; font-weight: 500;\">\r\n      Learn More\r\n    <\/a>\r\n  <\/div>\r\n<\/div><\/div>\n<p>Product | Affected Versions<\/p>\n<p>Linksys RE6250 | Up to 20250801<br \/>\nLinksys RE6300 | Up to 20250801<br \/>\nLinksys RE6350 | Up to 20250801<br \/>\nLinksys RE6500 | Up to 20250801<br \/>\nLinksys RE7000 | Up to 20250801<br \/>\nLinksys RE9000 | Up to 20250801<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43193-critical-memory-handling-vulnerability-in-macos\/\"  data-wpil-monitor-id=\"71702\">vulnerability stems from an improperly handled<\/a> argument in the langSelectionOnly function of the file \/goform\/langSwitchBack in the affected Linksys devices. By manipulating this argument, an attacker can trigger 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=\"72066\">buffer overflow<\/a>. This <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=\"73577\">overflow can lead to the execution of arbitrary code<\/a>, granting the attacker extensive control over the system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-4123673783\" 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>An example exploit might look like this:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/goform\/langSwitchBack HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nlangSelectionOnly=1; [buffer overflow inducing payload]<\/code><\/pre>\n<p>This payload would exploit the <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=\"71808\">buffer overflow vulnerability<\/a>, potentially giving the attacker control over the affected system. Please note this is a conceptual example and not a working exploit.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>It is highly recommended for users and administrators of affected Linksys devices to apply the vendor patch as soon as possible. If a patch is not currently available, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation. It is also advised to monitor any unusual network activity and regularly update all systems and security <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-20133-remote-access-ssl-vpn-vulnerability-in-cisco-secure-firewall-asa-software-and-secure-ftd-software\/\"  data-wpil-monitor-id=\"76837\">software<\/a> to further fortify the security posture against such threats.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The cybersecurity landscape is riddled with threats that, if left unchecked, can lead to severe consequences. One such vulnerability that has recently come into the spotlight is CVE-2025-8833, a critical vulnerability plaguing various Linksys devices. This vulnerability is notable due to its high severity score and the potential system compromise or data leakage it [&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-64085","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\/64085","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=64085"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64085\/revisions"}],"predecessor-version":[{"id":69255,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/64085\/revisions\/69255"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=64085"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=64085"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=64085"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=64085"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=64085"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=64085"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=64085"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=64085"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=64085"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}