Critical Cisco ISE Vulnerability Causes System Crashes

Critical Cisco ISE Vulnerability Causes System Crashes

First seen 2 Dec 2025, 18:33 UTC •Scworld •90% similarity •34.5

Article Content

Browse articles
ThreatCluster

A critical denial-of-service vulnerability in Cisco's Identity Services Engine (ISE) has been identified, allowing unauthenticated attackers to crash the system. The flaw, tracked as CVE-2024-20399, affects ISE versions 3.4.0 through 3.4 Patch 3 and can be exploited by sending specially crafted RADIUS requests. This vulnerability disrupts network access control, leading to unexpected system restarts.

ThreatCluster AI How this analysis works

Extracted Entities

1 / 2

Community

Browse all →

Tracked Entities in This Story

Cisco Identity Services Engine (ISE)