OCTOBER 7, 2026
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Case File

CVE-2026-20306

CRITICAL · CVSS 9.1 EPSS 1.37% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-16 · Last synced 2026-10-07

CyberRota Analysis

AI-Generated

A critical vulnerability in the REST API of Cisco ISE and ISE-PIC allows authenticated remote attackers to perform command injection, potentially leading to arbitrary code execution and privilege escalation to root. Exploitation could result in a denial-of-service condition, rendering the affected node unavailable and preventing unauthenticated endpoints from accessing the network. Organizations using Cisco ISE should prioritize patching this vulnerability to safeguard their systems and maintain network availability.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-20306
Severity
CRITICAL
CVSS
9.1
EPSS
1.37%
Cisco

Original NVD Description

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.