{"id":76139,"date":"2025-09-25T13:16:50","date_gmt":"2025-09-25T13:16:50","guid":{"rendered":""},"modified":"2025-10-03T07:08:46","modified_gmt":"2025-10-03T13:08:46","slug":"cve-2025-54807-critical-authentication-bypass-vulnerability-in-device-firmware","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-54807-critical-authentication-bypass-vulnerability-in-device-firmware\/","title":{"rendered":"<strong>CVE-2025-54807: Critical Authentication Bypass Vulnerability in Device Firmware<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>We are delving into a critical vulnerability, labeled CVE-2025-54807, that poses a serious threat to the security of systems running on affected device firmware. This vulnerability arises from a hardcoded secret used for validating authentication tokens in the device firmware. If exploited, it allows an attacker to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-50641-authentication-bypass-vulnerability-in-pandoranext-tokenstool\/\"  data-wpil-monitor-id=\"84799\">bypass authentication<\/a> protocols, thus gaining unrestricted access to the system. Given the severity of the potential damage, understanding and mitigating this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-9114-critical-arbitrary-user-password-change-vulnerability-in-doccure-wordpress-theme\/\"  data-wpil-monitor-id=\"88272\">vulnerability should be a priority for all users<\/a> of the affected versions of firmware.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-54807<br \/>\nSeverity: Critical (CVSS 9.8)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: Complete <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=\"83865\">system compromise and potential<\/a> data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1676023397\" 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>Device Firmware | Version 1.0 to 3.5<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55454-authenticated-arbitrary-file-upload-vulnerability-in-dootask-v1-0-51\/\"  data-wpil-monitor-id=\"84437\">vulnerability exploits the hardcoded secret used for validating authentication<\/a> tokens in the device firmware. The attacker who successfully obtains the signing <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2022-38692-critical-rsa-key-size-validation-vulnerability-in-bootrom\/\"  data-wpil-monitor-id=\"84499\">key can use it to create valid<\/a> authentication tokens at will. This allows the attacker to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5060-authentication-bypass-vulnerability-in-bravis-user-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"85226\">bypass the authentication<\/a> process completely, gaining unrestricted access to the system. The attacker can then perform any action as if they were a legitimate user, including data theft, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-22404-potential-system-compromise-due-to-use-after-free-vulnerability\/\"  data-wpil-monitor-id=\"85574\">system compromise<\/a>, or initiating further attacks from the compromised system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-591740053\" 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 <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49532-integer-underflow-vulnerability-in-illustrator-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"86165\">illustrative example of how this vulnerability<\/a> might be exploited is given below:<\/p>\n<pre><code class=\"\" data-line=\"\"># Assume the attacker has obtained the signing key &quot;hardcoded_secret&quot;\nsigning_key = &quot;hardcoded_secret&quot;\n# The attacker crafts a malicious token with the signing key\nmalicious_token = jwt.encode({&quot;role&quot;: &quot;admin&quot;}, signing_key, algorithm=&quot;HS256&quot;)\n# The attacker can now make requests as an admin user\nhttp_request = &quot;&quot;&quot;\nGET \/sensitive_data HTTP\/1.1\nHost: target.example.com\nAuthorization: Bearer {}\n&quot;&quot;&quot;.format(malicious_token)\n# Send the request...<\/code><\/pre>\n<p>This example demonstrates how an attacker can use the hardcoded signing key to craft malicious tokens, impersonating an <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-39247-unauthenticated-admin-access-control-vulnerability-in-hikcentral-professional-versions\/\"  data-wpil-monitor-id=\"86120\">admin user and gaining access<\/a> to sensitive data.<\/p>\n<p><strong>Countermeasures and Mitigation<\/strong><\/p>\n<p>The most <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-52389-insecure-direct-object-reference-vulnerability-in-envasadora-h2o-eireli-soda-cristal\/\"  data-wpil-monitor-id=\"88138\">direct and effective way to mitigate this vulnerability<\/a> is to apply the patch provided by the vendor. In cases where immediate patching isn&#8217;t possible, a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can be used as a temporary mitigation strategy. These tools can detect and block suspicious activities, providing an additional layer of security. Additionally, it is recommended to regularly update and patch <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27215-unauthorized-system-modification-vulnerability-in-unifi-display-cast-devices\/\"  data-wpil-monitor-id=\"84876\">systems to prevent such vulnerabilities<\/a> from being exploited.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview We are delving into a critical vulnerability, labeled CVE-2025-54807, that poses a serious threat to the security of systems running on affected device firmware. This vulnerability arises from a hardcoded secret used for validating authentication tokens in the device firmware. If exploited, it allows an attacker to bypass authentication protocols, thus gaining unrestricted access [&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-76139","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\/76139","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=76139"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/76139\/revisions"}],"predecessor-version":[{"id":81081,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/76139\/revisions\/81081"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=76139"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=76139"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=76139"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=76139"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=76139"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=76139"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=76139"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=76139"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=76139"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}