CVE-2026-20181: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Cisco Cisco Identity Services Engine Software
CVE-2026-20181 is a critical vulnerability in Cisco Identity Services Engine (ISE) Software versions 3.1.0 through 3.5.0. It allows an authenticated attacker with administrative credentials to execute arbitrary commands on the underlying OS via crafted HTTP requests. Exploitation can lead to root privilege escalation and denial of service in single-node deployments, disrupting network access for unauthenticated endpoints until recovery.
AI Analysis
Technical Summary
This vulnerability involves improper limitation of a pathname to a restricted directory (path traversal) in Cisco Identity Services Engine Software versions 3.1.0 through 3.5.0. An authenticated remote attacker with administrative privileges can exploit insufficient validation of user-supplied input in HTTP requests to execute arbitrary commands on the underlying operating system. Successful exploitation results in privilege escalation to root and can cause denial of service in single-node deployments by disrupting network access for unauthenticated endpoints until the node is restored.
Potential Impact
An attacker with administrative credentials can execute arbitrary OS commands, escalate privileges to root, and cause denial of service in single-node deployments. This can disrupt network access for unauthenticated endpoints until the affected node is restored, impacting network availability and security.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, restrict administrative access and monitor for suspicious activity involving crafted HTTP requests.
CVE-2026-20181: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Cisco Cisco Identity Services Engine Software
Description
CVE-2026-20181 is a critical vulnerability in Cisco Identity Services Engine (ISE) Software versions 3.1.0 through 3.5.0. It allows an authenticated attacker with administrative credentials to execute arbitrary commands on the underlying OS via crafted HTTP requests. Exploitation can lead to root privilege escalation and denial of service in single-node deployments, disrupting network access for unauthenticated endpoints until recovery.
CVSS v3.1
Score 9.1critical
Affected software
Cisco
Cisco Identity Services Engine Software
Cisco
Cisco ISE Passive Identity Connector
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper limitation of a pathname to a restricted directory (path traversal) in Cisco Identity Services Engine Software versions 3.1.0 through 3.5.0. An authenticated remote attacker with administrative privileges can exploit insufficient validation of user-supplied input in HTTP requests to execute arbitrary commands on the underlying operating system. Successful exploitation results in privilege escalation to root and can cause denial of service in single-node deployments by disrupting network access for unauthenticated endpoints until the node is restored.
Potential Impact
An attacker with administrative credentials can execute arbitrary OS commands, escalate privileges to root, and cause denial of service in single-node deployments. This can disrupt network access for unauthenticated endpoints until the affected node is restored, impacting network availability and security.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, restrict administrative access and monitor for suspicious activity involving crafted HTTP requests.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisco
- Date Reserved
- 2025-10-08T11:59:15.393Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a32cb1b9f87a2db09260e35
Added to database: 06/17/2026, 16:28:11 UTC
Last enriched: 08/13/2026, 20:46:47 UTC
Last updated: 09/15/2026, 10:01:30 UTC
Views: 164
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