CVE-2026-20186CWE-77

Cisco Identity Services Engine Multiple Authenticated Remote Code Execution Vulnerability

Critical · published April 15, 2026

CVSS v3.1
9.9
EPSS
6%
Percentile
92.9
In the wild
Unconfirmed
What it is

A vulnerability in Cisco Identity Services Engine (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 Read Only Admin 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 these vulnerabilities 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.

The record
Technical detail
CVSS v3.1
9.9 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.05601 · 92.9th percentile
Weakness
CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')
Published
2026-04-15T16:03Z
EPSS history
Timeline
  • 15 APR 16:03Z
    Cisco Identity Services Engine Multiple Authenticated Remote Code Execution Vulnerability
    cvelistv5