CVE-2025-20304
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk11th percentile - higher than 11% of all known CVEs
Summary
Multiple vulnerabilities in the web-based management interface of Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to conduct a reflected XSS attack against a user of the interface. These vulnerabilities are due to insufficient validation of user-supplied input by the web-based management interface of an affected system. An attacker could exploit these vulnerabilities by injecting malicious code into specific pages of the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. To exploit these vulnerabilities, the attacker must have at least a low-privileged account on the affected device.
Risk Assessment
Reflected XSS in the Cisco ISE management interface can allow a low-privileged attacker to execute malicious code in a victim's browser, potentially leading to data theft or session takeover. The risk is limited by the authentication requirement but remains relevant for network security.
Recommendation
Apply available security updates for Cisco ISE and Cisco ISE-PIC. Additionally, restrict access to the management interface to trusted networks and implement XSS protections.
Other vulnerabilities in Cisco ISE
See all- CVE-2026-76423Critical
A vulnerability in the REST API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to gain administrative access to an affected device. This is due to insufficient authorization checks in the REST API web service. An attacker can send crafted HTTP requests to the exposed REST API port to read and modify configuration and identity data with administrative privileges.
- CVE-2026-20307Critical
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).
- CVE-2026-20306Critical
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).
- CVE-2026-20305Critical
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).
- CVE-2026-20234Critical
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).
- CVE-2026-20148Medium
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.
- CVE-2026-20147Critical
A vulnerability in Cisco ISE and Cisco ISE-PIC allows an authenticated remote administrator to execute arbitrary commands on the underlying OS. The issue is due to insufficient input validation.
- CVE-2025-20337CriticalActively exploited
A vulnerability in a specific API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to execute arbitrary code on the underlying operating system as root. The attacker does not require any valid credentials to exploit this vulnerability. This vulnerability is due to insufficient validation of user-supplied input.
- CVE-2026-76444Medium
A missing authentication vulnerability exists in the Policy Runtime Repository Table (PRRT) service of Cisco ISE and Cisco ISE-PIC. An unauthenticated remote attacker could send a crafted request to retrieve sensitive configuration information from an affected device.
- CVE-2026-76439Medium
Insufficient authentication on an internal interface exposed through the guest portal of Cisco ISE allows an unauthenticated remote attacker to submit forged posture status events into the endpoint posture pipeline. A crafted request can manipulate posture status on the affected system.
Original NVD description (English source)
Multiple vulnerabilities in the web-based management interface of Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to conduct a reflected XSS attack against a user of the interface. These vulnerabilities are due to insufficient validation of user-supplied input by the web-based management interface of an affected system. An attacker could exploit these vulnerabilities by injecting malicious code into specific pages of the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. To exploit these vulnerabilities, the attacker must have at least a low-privileged account on the affected device.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS