{"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":"CVE-2025-20152: Cisco Identity Services Engine (ISE) Denial of Service Vulnerability<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

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<\/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.
\nGiven the widespread use of 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 infrastructure should be aware of this vulnerability<\/a> and take immediate steps to mitigate the risk of exploitation.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-20152
\nSeverity: High (8.6 CVSS Severity Score)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Possible system compromise or data<\/a> leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Cisco Identity Services Engine (ISE) | All versions prior<\/a> to the latest patch<\/p>\n

How the Exploit Works<\/strong><\/p>\n

This vulnerability stems from improper<\/a> handling of certain RADIUS requests within the Cisco ISE. An attacker can exploit this vulnerability by sending a specific 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, leading to a denial of service<\/a> condition. This could potentially provide the attacker with an opportunity to compromise the system<\/a> or leak data.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Here is a conceptual example of a 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

POST \/radius\/authentication HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/json\n{ \"auth_request\": \"malicious_payload\" }<\/code><\/pre>\n
In the above example, “malicious_payload” represents a specially crafted authentication request designed to trigger the vulnerability<\/a> in Cisco ISE’s RADIUS message processing feature.<\/p>\n
Recommendations for Mitigation<\/strong><\/p>\n
Organizations are advised to apply the patch provided by 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 prevent the exploitation of such vulnerabilities<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"
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 […]<\/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,"_monsterinsights_skip_tracking":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":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t