CVE-2026-20181: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Cisco Cisco Identity Services Engine Software
A vulnerability in Cisco ISE and ISE-PIC 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 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 user-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 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 Analysis
Technical Summary
This vulnerability in Cisco ISE and ISE-PIC arises from insufficient validation of user-supplied input, enabling path traversal attacks. An attacker with valid administrative credentials can send crafted HTTP requests to execute arbitrary OS commands, escalate privileges to root, and potentially cause denial of service in single-node deployments by rendering the node unavailable. The CVSS 3.1 base score is 9.1, reflecting network attack vector, low attack complexity, high privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. Affected versions explicitly include 3.1.0, 3.2.0, 3.3.0, 3.4.0, and 3.5.0.
Potential Impact
Successful exploitation allows an authenticated attacker to execute arbitrary commands on the underlying OS, escalate privileges to root, and potentially cause denial of service by making the ISE node unavailable. This can disrupt network access for endpoints that have not yet authenticated, impacting network availability and security.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vulnerability requires valid administrative credentials, ensure strict access controls and credential management. Monitor Cisco advisories for official fixes or temporary mitigations.
CVE-2026-20181: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Cisco Cisco Identity Services Engine Software
Description
A vulnerability in Cisco ISE and ISE-PIC 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 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 user-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 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.
CVSS v3.1
Score 9.1critical
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Cisco ISE and ISE-PIC arises from insufficient validation of user-supplied input, enabling path traversal attacks. An attacker with valid administrative credentials can send crafted HTTP requests to execute arbitrary OS commands, escalate privileges to root, and potentially cause denial of service in single-node deployments by rendering the node unavailable. The CVSS 3.1 base score is 9.1, reflecting network attack vector, low attack complexity, high privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. Affected versions explicitly include 3.1.0, 3.2.0, 3.3.0, 3.4.0, and 3.5.0.
Potential Impact
Successful exploitation allows an authenticated attacker to execute arbitrary commands on the underlying OS, escalate privileges to root, and potentially cause denial of service by making the ISE node unavailable. This can disrupt network access for endpoints that have not yet authenticated, impacting network availability and security.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vulnerability requires valid administrative credentials, ensure strict access controls and credential management. Monitor Cisco advisories for official fixes or temporary mitigations.
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: 6a32cb1b9f87a2db09260e35
Added to database: 6/17/2026, 4:28:11 PM
Last enriched: 6/17/2026, 4:42:43 PM
Last updated: 6/17/2026, 6:37:37 PM
Views: 8
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