Cisco ISE Path Traversal via Authenticated HTTP Request
CVE-2026-20146 Published on July 15, 2026

Cisco Identity Services Engine Path Traversal Vulnerability
A vulnerability in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an authenticated, remote attacker to perform path traversal attacks on the underlying operating system to either read or delete arbitrary files. 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 a crafted HTTP request to an affected system. A successful exploit could allow the attacker to access sensitive files or delete arbitrary files on the affected system.

NVD

Vulnerability Analysis

CVE-2026-20146 is exploitable with network access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity, and no impact on availability.

Attack Vector:

NETWORK

Attack Complexity:

LOW

Privileges Required:

HIGH

User Interaction:

NONE

Scope:

UNCHANGED

Confidentiality Impact:

HIGH

Integrity Impact:

LOW

Availability Impact:

NONE

Weakness Type

What is a Directory traversal Vulnerability?

The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

CVE-2026-20146 has been classified to as a Directory traversal vulnerability or weakness.

Products Associated with CVE-2026-20146

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Cisco Identity Services Engine Software

Affected Versions

Cisco Identity Services Engine Software:

Version 3.1.0 is affected.
Version 3.1.0 p1 is affected.
Version 3.1.0 p3 is affected.
Version 3.1.0 p2 is affected.
Version 3.2.0 is affected.
Version 3.1.0 p4 is affected.
Version 3.1.0 p5 is affected.
Version 3.2.0 p1 is affected.
Version 3.1.0 p6 is affected.
Version 3.2.0 p2 is affected.
Version 3.1.0 p7 is affected.
Version 3.3.0 is affected.
Version 3.2.0 p3 is affected.
Version 3.2.0 p4 is affected.
Version 3.1.0 p8 is affected.
Version 3.2.0 p5 is affected.
Version 3.2.0 p6 is affected.
Version 3.1.0 p9 is affected.
Version 3.3 Patch 2 is affected.
Version 3.3 Patch 1 is affected.
Version 3.3 Patch 3 is affected.
Version 3.4.0 is affected.
Version 3.2.0 p7 is affected.
Version 3.3 Patch 4 is affected.
Version 3.4 Patch 1 is affected.
Version 3.1.0 p10 is affected.
Version 3.3 Patch 5 is affected.
Version 3.3 Patch 6 is affected.
Version 3.4 Patch 2 is affected.
Version 3.3 Patch 7 is affected.
Version 3.4 Patch 3 is affected.
Version 3.5.0 is affected.
Version 3.4 Patch 4 is affected.
Version 3.3 Patch 8 is affected.
Version 3.2 Patch 8 is affected.
Version 3.5 Patch 1 is affected.
Version 3.3 Patch 9 is affected.
Version 3.2 Patch 9 is affected.
Version 3.4 Patch 5 is affected.
Version 3.5 Patch 3 is affected.
Version 3.5 Patch 2 is affected.
Version 3.3 Patch 10 is affected.

Cisco ISE Passive Identity Connector: