CVE-2025-20152 ISE restart

High 8.6 Published 21 May 2025 Updated 21 May 2025

An unauthenticated remote attacker can cause a denial of service by sending specific RADIUS requests to Cisco ISE, forcing the device to reload.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-20152?

CVE-2025-20152 is a high-severity denial of service vulnerability in Cisco Identity Services Engine, published on 21 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the RADIUS message processing feature of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of certain RADIUS requests. An attacker could exploit this vulnerability by sending a specific authentication request to a network access device (NAD) that uses Cisco ISE for authentication, authorization, and accounting (AAA). A successful exploit could allow the attacker to cause Cisco ISE to reload.

Weakness: CWE-125

Which versions are affected by CVE-2025-20152?

It affects 1 product.

Products include Cisco Identity Services Engine.

How do I fix CVE-2025-20152?

No fix has been published for CVE-2025-20152 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-20152 being exploited?

There is no known exploitation of CVE-2025-20152 in the wild and no public exploit code.

All Cisco Identity Services Engine vulnerabilities

Sources

Also known as GHSA-pmc7-hgjr-qwv3.