OCTOBER 7, 2026
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Case File

CVE-2026-20176

CRITICAL · CVSS 9.1 EPSS 0.78% Public Exploit

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

CyberRota Analysis

AI-Generated

A critical vulnerability in Cisco Identity Services Engine (ISE) allows authenticated remote attackers with high-privileged administrative credentials to execute arbitrary commands on the underlying operating system by sending crafted HTTP requests. Successful exploitation can lead to system-level access, potential privilege escalation to root, and may cause denial-of-service conditions in single-node deployments, preventing unauthenticated endpoints from accessing the network. Organizations using Cisco ISE should prioritize remediation to protect against this significant security risk.

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-2026-20176
Severity
CRITICAL
CVSS
9.1
EPSS
0.78%
Cisco

Original NVD Description

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.