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CVE-2026-20180: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Cisco Cisco Identity Services Engine Software

0
Critical
VulnerabilityCVE-2026-20180cvecve-2026-20180
Published: Wed Apr 15 2026 (04/15/2026, 16:03:51 UTC)
Source: CVE Database V5
Vendor/Project: Cisco
Product: Cisco Identity Services Engine Software

Description

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.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 04/15/2026, 16:31:56 UTC

Technical Analysis

This vulnerability in Cisco ISE arises from improper limitation of a pathname to a restricted directory (path traversal), enabling an authenticated attacker with Read Only Admin privileges to send crafted HTTP requests that execute arbitrary OS commands. Successful exploitation grants user-level OS access and potential privilege escalation to root. In single-node ISE setups, this can cause node unavailability and denial of service for network endpoints awaiting authentication. The CVSS 3.1 base score is 9.9, indicating critical severity with network attack vector, low attack complexity, required privileges, no user interaction, and complete confidentiality, integrity, and availability impact.

Potential Impact

An attacker with Read Only Admin credentials can execute arbitrary commands on the underlying OS, potentially gaining root privileges. This compromises confidentiality, integrity, and availability of the affected system. In single-node deployments, exploitation can cause denial of service, preventing network access for unauthenticated endpoints until the node is restored. There are no known exploits in the wild as of the published date.

Mitigation Recommendations

Patch status is not yet confirmed — check the Cisco vendor advisory for current remediation guidance. Since no official fix or temporary workaround is indicated in the provided data, organizations should monitor Cisco advisories for updates. Restricting access to Read Only Admin credentials and limiting network exposure of the ISE management interface may reduce risk until a patch is available.

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Technical Details

Data Version
5.2
Assigner Short Name
cisco
Date Reserved
2025-10-08T11:59:15.393Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 69dfb9f882d89c981f6ee6b8

Added to database: 4/15/2026, 4:16:56 PM

Last enriched: 4/15/2026, 4:31:56 PM

Last updated: 4/15/2026, 6:30:22 PM

Views: 6

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