{"id":47210,"date":"2025-06-01T01:41:30","date_gmt":"2025-06-01T01:41:30","guid":{"rendered":""},"modified":"2025-07-07T05:24:26","modified_gmt":"2025-07-07T11:24:26","slug":"cve-2025-20152-cisco-identity-services-engine-ise-denial-of-service-vulnerability","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-20152-cisco-identity-services-engine-ise-denial-of-service-vulnerability\/","title":{"rendered":"<strong>CVE-2025-20152: Cisco Identity Services Engine (ISE) Denial of Service Vulnerability<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In the ever-evolving landscape of cybersecurity, new vulnerabilities are discovered regularly. One of these is the CVE-2025-20152, a significant vulnerability identified in the RADIUS message processing feature of Cisco Identity Services Engine (ISE). This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32814-unauthenticated-sql-injection-vulnerability-in-infoblox-netmri\/\"  data-wpil-monitor-id=\"52808\">vulnerability may allow unauthenticated<\/a> remote attackers to create a denial of service (DoS) condition on an affected device, potentially leading to system compromise or data leakage, and hence, poses a significant threat to the confidentiality, integrity, and availability of data.<br \/>\nGiven the widespread use of <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-20282-unauthenticated-file-upload-and-execution-vulnerability-in-cisco-ise-and-ise-pic\/\"  data-wpil-monitor-id=\"64485\">Cisco ISE<\/a> for authentication, authorization, and accounting (AAA) in network access devices (NAD), this vulnerability is of particular concern. Any organization utilizing Cisco ISE in their <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-45468-critical-cloud-infrastructure-vulnerability-in-fc-stable-diffusion-plus-v1-0-18\/\"  data-wpil-monitor-id=\"53011\">infrastructure should be aware of this vulnerability<\/a> and take immediate steps to mitigate the risk of exploitation.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-20152<br \/>\nSeverity: High (8.6 CVSS Severity Score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: Possible <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-26625-linux-kernel-vulnerability-leading-to-potential-system-compromise-or-data-leakage\/\"  data-wpil-monitor-id=\"53138\">system compromise or data<\/a> leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-3456827137\" 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>Cisco Identity Services Engine (ISE) | All <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48865-manipulation-of-x-forwarded-headers-in-fabio-prior-to-version-1-6-6\/\"  data-wpil-monitor-id=\"58305\">versions prior<\/a> to the latest patch<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-46444-improper-control-of-filename-vulnerability-in-ads-pro-plugin\/\"  data-wpil-monitor-id=\"56484\">vulnerability stems from improper<\/a> handling of certain RADIUS requests within the Cisco ISE. An attacker can exploit this vulnerability by sending a specific <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-36535-unrestricted-remote-access-due-to-lack-of-web-server-authentication-and-access-controls\/\"  data-wpil-monitor-id=\"52802\">authentication request to a network access<\/a> device (NAD) that uses Cisco ISE for AAA. A successful exploit could cause the Cisco ISE to reload, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49181-unauthorized-api-endpoint-access-leading-to-denial-of-service-and-data-leakage\/\"  data-wpil-monitor-id=\"61672\">leading to a denial of service<\/a> condition. This could potentially provide the attacker with an opportunity to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-41651-critical-system-compromise-due-to-missing-authentication\/\"  data-wpil-monitor-id=\"56485\">compromise the system<\/a> or leak data.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1076198910\" 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 a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-2409-file-corruption-vulnerability-in-aspect-with-potential-for-system-compromise\/\"  data-wpil-monitor-id=\"53137\">potential malicious RADIUS request that could exploit this vulnerability<\/a>. Note that this is a simplified representation and actual exploitation would likely involve more complex techniques.<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/radius\/authentication HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ &quot;auth_request&quot;: &quot;malicious_payload&quot; }<\/code><\/pre>\n<p>In the above example, &#8220;malicious_payload&#8221; represents a specially crafted <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-41225-authenticated-command-execution-vulnerability-in-vcenter-server\/\"  data-wpil-monitor-id=\"52822\">authentication request designed to trigger the vulnerability<\/a> in Cisco ISE&#8217;s RADIUS message processing feature.<\/p>\n<p><strong>Recommendations for Mitigation<\/strong><\/p>\n<p>Organizations are advised to apply the patch provided by <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-20163-critical-ssh-vulnerability-in-cisco-nexus-dashboard-fabric-controller\/\"  data-wpil-monitor-id=\"59078\">Cisco to remediate this vulnerability<\/a>. In situations where immediate patching is not possible, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation. Regularly updating and patching systems, following a least privilege model, and monitoring network traffic can also help <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-49155-uncontrolled-search-path-vulnerability-in-trend-micro-apex-one-data-loss-prevention-module\/\"  data-wpil-monitor-id=\"64486\">prevent the exploitation of such vulnerabilities<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In the ever-evolving landscape of cybersecurity, new vulnerabilities are discovered regularly. One of these is the CVE-2025-20152, a significant vulnerability identified in the RADIUS message processing feature of Cisco Identity Services Engine (ISE). This vulnerability may allow unauthenticated remote attackers to create a denial of service (DoS) condition on an affected device, potentially 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":[96],"product":[],"attack_vector":[87],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-47210","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-cisco","attack_vector-dos"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/47210","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=47210"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/47210\/revisions"}],"predecessor-version":[{"id":57990,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/47210\/revisions\/57990"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=47210"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=47210"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=47210"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=47210"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=47210"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=47210"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=47210"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=47210"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=47210"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}