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CVE-2026-20148: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Cisco Cisco Identity Services Engine Software

0
Medium
VulnerabilityCVE-2026-20148cvecve-2026-20148cisco
Published: 08/13/2026 (08/13/2026, 05:00:00 UTC)
Source: CVE Database V5
Vendor/Project: Cisco
Product: Cisco Identity Services Engine Software

Description

CVE-2026-20148 is a medium severity vulnerability in Cisco Identity Services Engine Software that allows an authenticated attacker with administrative credentials to perform path traversal attacks. This flaw enables reading arbitrary files on the underlying operating system by sending crafted HTTP requests due to improper validation of user input. The vulnerability affects specific versions 3.1.0 through 3.5.0 of the software. There is no confirmed patch or official remediation guidance available at this time.

CVSS v3.1

Score 4.9medium

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Affected software

Cisco

Cisco Identity Services Engine Software

Affected versions
=3.1.0=3.2.0=3.3.0=3.4.0=3.5.0

Cisco

Cisco ISE Passive Identity Connector

Affected versions
=3.2.0=3.1.0=3.3.0=3.4.0
GitHub Actionsmore threats →ai
cisco/identity-services-engine-software
pkg:github/cisco/identity-services-engine-software
Affected versions
=3.1.0=3.2.0=3.3.0=3.4.0=3.5.0

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/13/2026, 20:46:29 UTC

Technical Analysis

This vulnerability in Cisco ISE and Cisco ISE-PIC arises from improper validation of user-supplied input, allowing an authenticated remote attacker with administrative privileges to perform path traversal attacks. By sending specially crafted HTTP requests, the attacker can read arbitrary files on the affected system, potentially exposing sensitive information. The CVSS 3.1 base score is 4.9 (medium), reflecting network attack vector, low complexity, high privileges required, no user interaction, unchanged scope, high confidentiality impact, and no integrity or availability impact. Affected versions explicitly include 3.1.0, 3.2.0, 3.3.0, 3.4.0, and 3.5.0. No vendor advisory or patch information is currently provided.

Potential Impact

An attacker with valid administrative credentials can exploit this vulnerability to read arbitrary files on the underlying operating system of the affected Cisco ISE systems. This could lead to exposure of sensitive information stored on the system. There is no indication of impact on system integrity or availability.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict administrative access to trusted personnel only and monitor for suspicious activity involving crafted HTTP requests targeting path traversal.

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Technical Details

Data Version
5.2
Assigner Short Name
cisco
Date Reserved
2025-10-08T11:59:15.385Z
Cvss Version
3.1
State
PUBLISHED

Threat ID: 69dfb9f882d89c981f6ee6ab

Added to database: 04/15/2026, 16:16:56 UTC

Last enriched: 08/13/2026, 20:46:29 UTC

Last updated: 09/12/2026, 14:38:51 UTC

Views: 224

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