CVE-2026-76423

A vulnerability in the APIs of Cisco ISE could allow an authenticated, remote attacker to conduct SQL injection attacks against the backend database. This vulnerability is due to insufficient validation of certain parameters that are concatenated directly into an SQL query. An attacker could exploit this vulnerability by sending a crafted request that contains SQL statements to an affected endpoint.

A vulnerability in the REST API of Cisco ISE could allow an authenticated, remote attacker to upload or copy arbitrary files on an affected device. This vulnerability is due to insufficient validation in file operations. An attacker could exploit this vulnerability by uploading a file with a crafted path.

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.

Vulnerability in Cisco ISE allows an authenticated, remote attacker to perform SQL injection attacks on an affected device. Low-privileged administrative credentials are required. This is due to improper validation of user-supplied input.

Vulnerability in Cisco ISE allows an unauthenticated, remote attacker to perform SQL injection attacks on an affected device. This is due to improper validation of user-supplied input.

A vulnerability in the web-based management interface of Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system. The attacker must have at least low-privileged administrative credentials. The issue is due to insecure deserialization of a user-supplied Java byte stream; successful exploitation could allow code execution and privilege escalation to root, and in single-node deployments could cause the ISE node to become unavailable (DoS).

A vulnerability in the REST API of Cisco ISE and ISE-PIC could allow an authenticated, remote attacker to perform command injection attacks on the underlying operating system and elevate privileges to root. The attacker must have valid administrative credentials. The issue is due to improper validation of user-supplied input; successful exploitation could allow arbitrary code execution, and in single-node deployments could cause the ISE node to become unavailable (DoS).

A vulnerability in the diagnostic tools of Cisco ISE and ISE-PIC could allow an authenticated, remote attacker to perform command injection attacks on the underlying operating system and elevate privileges to root. The attacker must have valid administrative credentials. The issue is due to improper validation of user-supplied input; successful exploitation could allow arbitrary code execution, and in single-node deployments could cause the ISE node to become unavailable (DoS).

Cisco conducted an internal security review that resulted in a software hardening release addressing multiple internally discovered vulnerabilities in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC). The vulnerabilities tracked by CVE-2026-20234 relate to insufficiently protected credentials (CWE-522).

A vulnerability in Cisco ISE and Cisco ISE-PIC allows an authenticated remote attacker to perform path traversal attacks on the underlying OS and read arbitrary files. The flaw is due to improper validation of user-supplied input.