What’s Vulnerable › Vulnerabilities
CVE-2026-20352: Cisco Identity Services Engine RADIUS Denial of Service Vulnerability
- Severity: high (CVSS 8.6 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-16 · updated 2026-09-18
- Weakness: CWE-119
Description
A vulnerability in the RADIUS 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 crafted RADIUS request directly to an affected device. A successful exploit could allow the attacker to cause the ISE node to become unavailable. For single node deployments in that condition, endpoints that have not already authenticated would be unable to access the network until the node comes back up on its own.
Affected products
- Cisco Identity Services Engine: 3.2.0, 3.2.0 p1, 3.2.0 p2, 3.3.0, 3.2.0 p3, 3.2.0 p4 (+28)
In the news
References
Get alerted when CVE-2026-20352 or the next vulnerability affects your stack