What’s Vulnerable › Vulnerabilities

CVE-2022-20937

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-11-04 · updated 2026-06-17
• Weakness: CWE-410

Description

A vulnerability in a feature that monitors RADIUS requests on Cisco Identity Services Engine (ISE) Software could allow an unauthenticated, remote attacker to negatively affect the performance of an affected device. This vulnerability is due to insufficient management of system resources. An attacker could exploit this vulnerability by taking actions that cause Cisco ISE Software to receive specific RADIUS traffic. A successful and sustained exploit of this vulnerability could allow the attacker to cause reduced performance of the affected device, resulting in significant delays to RADIUS authentications. There are workarounds that address this vulnerability.

Affected products

• Cisco Identity Services Engine: before 2.7.0; 2.7.0, 2.7.0-patch1, 2.7.0-patch2, 2.7.0-patch3, 2.7.0-patch4, 2.7.0-patch5 (+11) — fixed in 2.7.0

How to fix

Upgrade to a fixed version: Cisco Identity Services Engine 2.7.0. Check the vendor advisory for mitigations.

References

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-sec-atk-dos-zw5RCUYp
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-sec-atk-dos-zw5RCUYp

Get alerted when CVE-2022-20937 or the next vulnerability affects your stack