CVE-2026-20283
MediumCVSS 6.5Summary
Insufficient validation of user-supplied input in IPsec Open API calls in Cisco ISE allows an authenticated remote attacker to inject arbitrary commands on the underlying operating system. Exploitation requires valid administrative credentials and a node with more than one network interface, one of which is an active IPsec tunnel.
Risk Assessment
An attacker with administrative privileges can execute arbitrary commands on the system, and because root escalation is easy, Cisco assigned a High rating. This poses a serious risk of device compromise.
Recommendation
Urgently apply the Cisco fix, restrict access to the IPsec Open API, and review interface and IPsec tunnel configuration.
Other vulnerabilities in Cisco Identity Services Engine (ISE)
See all- CVE-2026-76451Medium
A vulnerability in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) allows an authenticated remote attacker to conduct an SQL or HQL injection attack. It is caused by insufficient validation of user-supplied input to the affected APIs before it is used to build database queries. An attacker with valid administrative credentials could execute arbitrary SQL or HQL queries and access data they are not authorized to view or modify.
- CVE-2026-76450Medium
A vulnerability in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) allows an authenticated remote attacker to conduct an SQL or HQL injection attack. It is caused by insufficient validation of user-supplied input to the affected APIs before it is used to build database queries. An attacker with valid administrative credentials could execute arbitrary SQL or HQL queries and access data they are not authorized to view or modify.
- CVE-2026-76449Medium
A vulnerability in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) allows an authenticated remote attacker to conduct an SQL or HQL injection attack. It is caused by insufficient validation of user-supplied input to the affected APIs before it is used to build database queries. An attacker with valid administrative credentials could execute arbitrary SQL or HQL queries and access data they are not authorized to view or modify.
- CVE-2026-76448Medium
A vulnerability in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) allows an authenticated remote attacker to conduct an SQL or HQL injection attack. It is caused by insufficient validation of user-supplied input to the affected APIs before it is used to build database queries. An attacker with valid administrative credentials could execute arbitrary SQL or HQL queries and access data they are not authorized to view or modify.
- CVE-2026-76447Medium
A vulnerability in the Online Certificate Status Protocol (OCSP) responder of Cisco ISE and Cisco ISE-PIC allows an unauthenticated remote attacker to cause an administrative reload of the OCSP responder certificate and key material. It is caused by missing authentication on a function of the OCSP responder. An attacker could send a crafted request to trigger the reload of certificate and key material on demand.
- CVE-2026-76446Medium
A vulnerability in an API of Cisco ISE and Cisco ISE-PIC allows an authenticated remote attacker to read specific files on the underlying operating system of an affected device. It is caused by improper restriction of XML external entity references (XXE). An attacker could send a crafted request to read files that the underlying process has permission to access.
- CVE-2026-20309Medium
The web-based management interface of Cisco Identity Services Engine (ISE) does not properly validate user-supplied input, allowing an unauthenticated remote attacker to conduct a reflected cross-site scripting (XSS) attack. By persuading a user to click a crafted link, the attacker can execute arbitrary script code in the context of the interface or access sensitive browser-based information.
- CVE-2026-20287Medium
An internal security review by Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) engineering teams revealed multiple vulnerabilities related to improper privilege management (CWE-269). A software hardening release addressing these internally discovered issues has been made available.
- CVE-2026-20286Medium
Lack of server-side validation of Administrator permissions in the web-based management interface of Cisco Identity Services Engine (ISE) allows an authenticated remote attacker to modify parts of the configuration. The attacker submits a crafted HTTP request to modify descriptions of files on a specific page.
- CVE-2026-20285Medium
Lack of server-side validation of Administrator permissions in the web-based management interface of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) allows an authenticated remote attacker to modify parts of the configuration. The attacker submits a crafted HTTP request to modify descriptions of files on a specific page.
Original NVD description (English source)
A vulnerability in the IPsec Open API endpoint of Cisco ISE could allow an authenticated, remote attacker to inject arbitrary commands on the underlying operating system. This vulnerability is due to insufficient validation of user-supplied input in IPsec Open API calls. An attacker could exploit this vulnerability by sending crafted input to the IPsec Open API endpoint on an affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system. To exploit this vulnerability, the attacker must have valid administrative credentials and the node must have more than one network interface, one of which must be configured as an active IPsec tunnel. Note: For CVE-2026-20283, 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.