{"id":73559,"date":"2025-09-10T09:33:17","date_gmt":"2025-09-10T09:33:17","guid":{"rendered":""},"modified":"2025-10-21T17:37:19","modified_gmt":"2025-10-21T23:37:19","slug":"cve-2025-56752-critical-authentication-bypass-vulnerability-in-ruijie-rg-es-series-switch-firmware","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-56752-critical-authentication-bypass-vulnerability-in-ruijie-rg-es-series-switch-firmware\/","title":{"rendered":"<strong>CVE-2025-56752: Critical Authentication Bypass Vulnerability in Ruijie RG-ES Series Switch Firmware<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The cybersecurity world is abuzz with news of a significant vulnerability identified in the Ruijie RG-ES series switch firmware ESW_1.0(1)B1P39. This vulnerability, assigned the identifier CVE-2025-56752, has the potential to allow remote attackers unrestricted access to targeted devices. This could lead to drastic consequences, including the possible commandeering of affected <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2022-45134-critical-vulnerability-in-mahara-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"82896\">systems and potential<\/a> data leakage.<br \/>\nThis vulnerability poses a serious threat to organizations that rely on the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55293-high-risk-vulnerability-in-meshtastic-s-mesh-networking-solution\/\"  data-wpil-monitor-id=\"81319\">Ruijie RG-ES series switches<\/a> for their network infrastructure. Given the severity of the potential impact, it&#8217;s of utmost <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=\"90910\">importance to understand this vulnerability<\/a> and implement the necessary mitigations.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-56752<br \/>\nSeverity: Critical, CVSS score 9.4<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: Full <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-7775-critical-memory-overflow-vulnerability-in-netscaler-adc-and-gateway-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"83766\">system compromise and potential<\/a> data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-923038271\" 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>Ruijie RG-ES Series Switch | ESW_1.0(1)B1P39<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The exploit takes advantage of a vulnerability in the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-54982-critical-zscaler-s-saml-authentication-mechanism-vulnerability\/\"  data-wpil-monitor-id=\"81537\">authentication mechanism<\/a> of the RG-ES series switches&#8217; firmware. By crafting a malicious HTTP POST request to \/user.cgi, an attacker can <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50901-critical-authentication-bypass-vulnerability-in-jeewms\/\"  data-wpil-monitor-id=\"82087\">bypass the authentication<\/a> process entirely. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-57819-critical-vulnerability-in-freepbx-allowing-unauthenticated-access-and-remote-code-execution\/\"  data-wpil-monitor-id=\"86553\">allows them direct and unrestricted access<\/a> to the administrative settings of the device.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1717910170\" 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>Below is a conceptual example of a malicious HTTP POST <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49382-cross-site-request-forgery-vulnerability-in-jobzilla-wordpress-theme\/\"  data-wpil-monitor-id=\"81170\">request that could exploit this vulnerability<\/a>. The actual malicious payload would depend on the attacker&#8217;s goal.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/user.cgi HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nusername=admin&amp;password=123456&amp;submit=Login<\/code><\/pre>\n<p>Once the request is made, the attacker <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48860-exploiting-backup-archives-to-gain-remote-access-in-ctrlx-os\/\"  data-wpil-monitor-id=\"81417\">gains full access<\/a> to the targeted device, bypassing the usual authentication process.<\/p>\n<p><strong>Recommendations for Mitigation<\/strong><\/p>\n<p>The most effective mitigation for this vulnerability is to apply the vendor-supplied patch. If the patch cannot be applied immediately, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary measure to detect and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8418-arbitrary-plugin-installation-vulnerability-in-b-slider-gutenberg-slider-block-for-wp-plugin\/\"  data-wpil-monitor-id=\"82554\">block attacks exploiting this vulnerability<\/a>. However, these are temporary measures and do not substitute for the application of the patch, which is necessary to fully resolve the vulnerability.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The cybersecurity world is abuzz with news of a significant vulnerability identified in the Ruijie RG-ES series switch firmware ESW_1.0(1)B1P39. This vulnerability, assigned the identifier CVE-2025-56752, has the potential to allow remote attackers unrestricted access to targeted devices. This could lead to drastic consequences, including the possible commandeering of affected systems and potential data [&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":[75],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-73559","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-authentication-bypass"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/73559","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=73559"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/73559\/revisions"}],"predecessor-version":[{"id":83855,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/73559\/revisions\/83855"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=73559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=73559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=73559"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=73559"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=73559"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=73559"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=73559"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=73559"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=73559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}