CVE-2026-76425

Cisco ISE SQL Injection Vulnerability

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 successful exploit could allow the attacker to read arbitrary content from the SQL database and conduct server-side request forgery (SSRF) attacks. To exploit this vulnerability, the attacker must have valid administrative credentials.

CVSS 3.1 · 7.6 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Identity Services Engine Software

CVE-2026-76424

Cisco ISE Arbitrary File Access Vulnerability

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 successful exploit could allow the attacker to upload files to arbitrary locations and execute arbitrary commands as root on the affected device.&nbsp;To exploit this vulnerability, the attacker must have valid administrative credentials.

CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Identity Services Engine Software

CVE-2026-20146

Cisco Identity Services Engine Path Traversal Vulnerability

A vulnerability in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an authenticated, remote attacker to perform path traversal attacks on the underlying operating system to either read or delete arbitrary files. To exploit this vulnerability, the attacker must have valid administrative credentials.&nbsp; This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected system. A successful exploit could allow the attacker to access sensitive files or delete arbitrary files on the affected system.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Identity Services Engine Passive Identity Connector Identity Services Engine Software

CVE-2026-20147

Cisco Identity Services Engine Remote Code Execution Vulnerability

A vulnerability in Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root. In single-node ISE deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a denial of service (DoS) condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored.

CVSS 3.1 · 9.9 Critical EPSS 10.6% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Identity Services Engine Passive Identity Connector Identity Services Engine Software

CVE-2026-20148

Cisco Identity Services Engine Path Traversal Vulnerability

A vulnerability in Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to perform path traversal attacks on the underlying operating system and read arbitrary files. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected system. A successful exploit could allow the attacker to access sensitive files on the affected system.

CVSS 3.1 · 4.9 Medium EPSS 6.7% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Identity Services Engine Passive Identity Connector Identity Services Engine Software

CVE-2026-20181

Cisco Identity Services Engine Remote Code Execution Vulnerability

A vulnerability in Cisco ISE and ISE-PIC could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root. In single-node deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a denial of service (DoS) condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored.

CVSS 3.1 · 9.1 Critical EPSS 8.2% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Identity Services Engine Passive Identity Connector Identity Services Engine Software

CVE-2026-20190

Cisco Identity Services Engine Information Disclosure Vulnerability

A vulnerability in Cisco ISE and ISE-PIC could allow an unauthenticated, remote attacker to view sensitive information on an affected device. This vulnerability is due to improper authorization checks when a resource is accessed. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to gain access to sensitive information, including hashed credentials that could be used in future attacks.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Identity Services Engine Passive Identity Connector Identity Services Engine Software

CVE-2026-20136

Cisco Identity Services Engine Authenticated Privilege Escalation Vulnerability

A vulnerability in the&nbsp;CLI of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an authenticated, local attacker with administrative privileges to perform a command injection attack on the underlying operating system and elevate privileges to root. This vulnerability is due to insufficient validation of user supplied input. An attacker could exploit this vulnerability by providing crafted input to a specific CLI command. A successful exploit could allow the attacker to elevate their privileges to root on the underlying operating system.

CVSS 3.1 · 6 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Identity Services Engine Passive Identity Connector Identity Services Engine Software

CVE-2026-20282

Cisco Identity Services Engine Authenticated Write Vulnerability

A vulnerability in Cisco ISE could allow an authenticated, remote attacker to obtain write access on the underlying operating system of an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to obtain write access to the underlying operating system. To exploit this vulnerability, the attacker must have valid administrative credentials. Note: For CVE-2026-20282, Cisco has assigned a Security Impact Rating (SIR) of High rather than Medium as the score indicates. The reason is that it is easy to get to root from the achieved privilege level.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Software

CVE-2026-20235

Cisco Identity Services Engine Information Disclosure Vulnerability

A vulnerability in the API of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker to view sensitive information on an affected device. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to insufficient validation of user-supplied parameters in API requests. An attacker could exploit this vulnerability by sending a crafted API request to an affected device. A successful exploit could allow the attacker to gain access to sensitive information, including hashed credentials that could be used in future attacks.

CVSS 3.1 · 4.9 Medium EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Software

CVE-2026-20306

Cisco Identity Services Engine Command Injection Vulnerability

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. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending crafted commands to the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the device and elevate privileges to root. In single-node deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a DoS condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored.

CVSS 3.1 · 9.1 Critical EPSS 1.6% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Passive Identity Connector Identity Services Engine Software

CVE-2026-20305

Cisco Identity Services Engine Command Injection Vulnerability

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&nbsp;root. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to improper validation of user-supplied input. An attacker could exploit this vulnerability by sending crafted commands to the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the device and elevate privileges to root. In single-node deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a denial of service (DoS) condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored.

CVSS 3.1 · 9.1 Critical EPSS 1.6% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Passive Identity Connector Identity Services Engine Software

CVE-2026-20307

Cisco Identity Services Engine Remote Code Execution Vulnerability

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 of an affected device. To exploit this vulnerability, the attacker must have at least low-privileged administrative credentials. This vulnerability is due to insecure deserialization of a user-supplied Java byte stream. An attacker could exploit this vulnerability by sending a crafted serialized Java object to the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the device and elevate privileges to root. In single-node deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a denial of service (DoS) condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored.

CVSS 3.1 · 9.9 Critical EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Software

CVE-2026-20211

Cisco Identity Services Engine Remote Code Execution Vulnerability

A vulnerability in Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have valid high-privileged administrative credentials. This vulnerability is due to insecure deserialization of Java objects by the affected software. An attacker could exploit this vulnerability by sending a crafted serialized Java object to an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to&nbsp;root. In single-node deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a DoS condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Software

CVE-2026-20194

Cisco Identity Services Engine Hardening Release - Incorrect Resource Transfer Vulnerabilities

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC), engineering teams have conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20194 are related to incorrect resource transfer between spheres that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-669.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Passive Identity Connector Identity Services Engine Software

CVE-2026-76423

Cisco ISE API Authentication Bypass Vulnerability

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 vulnerability is due to the REST API web service being exposed with insufficient authorization checks. An attacker could exploit this vulnerability by sending a crafted HTTP request to the exposed REST API port. A successful exploit could allow the attacker to read and modify ISE configuration and identity data with administrative privileges.

CVSS 3.1 · 10 Critical EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Passive Identity Connector Identity Services Engine Software

CVE-2026-20237

Cisco Identity Services Engine Hardening Release - Input Validation Vulnerabilities

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC), engineering teams have conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20237 are related to improper input validation issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-20.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Passive Identity Connector Identity Services Engine Software

CVE-2026-20176

Cisco Identity Services Engine Remote Code Execution Vulnerability

A vulnerability in Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have valid high-privileged administrative credentials. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to obtain system-level access to the underlying operating system and then elevate privileges to root. In single-node deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a DoS condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Software

CVE-2026-20352

Cisco Identity Services Engine RADIUS Denial of Service Vulnerability

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&nbsp;node comes back up on its own.

CVSS 3.1 · 8.6 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Software

CVE-2026-20247

Cisco Identity Services Engine Unauthenticated SQL Injection Vulnerability

A vulnerability in Cisco ISE could allow an unauthenticated, remote attacker to conduct SQL injection attacks on an affected device. 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 modify data in the underlying database.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Cisco

Products

Identity Services Engine Software