CVE-2026-20300: Cisco Identity Services Engine Software

High severity, CVSS 7.1. EPSS: 0.3% chance of exploitation in the next 30 days.

A vulnerability in Cisco ISE could allow an authenticated, remote attacker to conduct SQL injection attacks on an affected device. To exploit this vulnerability, the attacker must have at least low-privileged administrative credentials. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to read or modify data in the underlying database.

Affected products

• Cisco Cisco Identity Services Engine Software: version 3.1.0 only; version 3.1.0 p1 only; version 3.1.0 p3 only; version 3.1.0 p2 only; version 3.2.0 only; version 3.1.0 p4 only; …

Published 2026-09-16. Last modified 2026-09-18.