CVE-2026-20148: Cisco Identity Services Engine Path Traversal Vulnerability

Published Apr 15, 2026
·
Updated

A vulnerability in Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to perform path traversal attacks on the underlying operating system and read 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 on the affected system.

Affected Software

86 affected components
Cisco Identity Services Engine (ISE)
Cisco ISE-PIC
Cisco Identity Services Engine<3.1
Cisco Identity Services Engine=3.1.0
Cisco Identity Services Engine=3.1.0-patch1
Cisco Identity Services Engine=3.1.0-patch10
Cisco Identity Services Engine=3.1.0-patch2
Cisco Identity Services Engine=3.1.0-patch3
Cisco Identity Services Engine=3.1.0-patch4
Cisco Identity Services Engine=3.1.0-patch5
Cisco Identity Services Engine=3.1.0-patch6
Cisco Identity Services Engine=3.1.0-patch7
Cisco Identity Services Engine=3.1.0-patch8
Cisco Identity Services Engine=3.1.0-patch9
Cisco Identity Services Engine=3.2.0
Cisco Identity Services Engine=3.2.0-patch1
Cisco Identity Services Engine=3.2.0-patch2
Cisco Identity Services Engine=3.2.0-patch3
Cisco Identity Services Engine=3.2.0-patch4
Cisco Identity Services Engine=3.2.0-patch5
Cisco Identity Services Engine=3.2.0-patch6
Cisco Identity Services Engine=3.2.0-patch7
Cisco Identity Services Engine=3.2.0-patch8
Cisco Identity Services Engine=3.2.0-patch9
Cisco Identity Services Engine=3.3.0
Cisco Identity Services Engine=3.3.0-patch1
Cisco Identity Services Engine=3.3.0-patch10
Cisco Identity Services Engine=3.3.0-patch2
Cisco Identity Services Engine=3.3.0-patch3
Cisco Identity Services Engine=3.3.0-patch4
Cisco Identity Services Engine=3.3.0-patch5
Cisco Identity Services Engine=3.3.0-patch6
Cisco Identity Services Engine=3.3.0-patch7
Cisco Identity Services Engine=3.3.0-patch8
Cisco Identity Services Engine=3.3.0-patch9
Cisco Identity Services Engine=3.4.0
Cisco Identity Services Engine=3.4.0-patch1
Cisco Identity Services Engine=3.4.0-patch2
Cisco Identity Services Engine=3.4.0-patch3
Cisco Identity Services Engine=3.4.0-patch4
Cisco Identity Services Engine=3.4.0-patch5
Cisco Identity Services Engine=3.5.0
Cisco Identity Services Engine=3.5.0-patch1
Cisco Identity Services Engine=3.5.0-patch2
Cisco Identity Services Engine Passive Identity Connector<3.1.0
Cisco Identity Services Engine Passive Identity Connector=3.1.0
Cisco Identity Services Engine Passive Identity Connector=3.1.0-patch1
Cisco Identity Services Engine Passive Identity Connector=3.1.0-patch10
Cisco Identity Services Engine Passive Identity Connector=3.1.0-patch2
Cisco Identity Services Engine Passive Identity Connector=3.1.0-patch3
Cisco Identity Services Engine Passive Identity Connector=3.1.0-patch4
Cisco Identity Services Engine Passive Identity Connector=3.1.0-patch5
Cisco Identity Services Engine Passive Identity Connector=3.1.0-patch6
Cisco Identity Services Engine Passive Identity Connector=3.1.0-patch7
Cisco Identity Services Engine Passive Identity Connector=3.1.0-patch8
Cisco Identity Services Engine Passive Identity Connector=3.1.0-patch9
Cisco Identity Services Engine Passive Identity Connector=3.2.0
Cisco Identity Services Engine Passive Identity Connector=3.2.0-patch1
Cisco Identity Services Engine Passive Identity Connector=3.2.0-patch2
Cisco Identity Services Engine Passive Identity Connector=3.2.0-patch3
Cisco Identity Services Engine Passive Identity Connector=3.2.0-patch4
Cisco Identity Services Engine Passive Identity Connector=3.2.0-patch5
Cisco Identity Services Engine Passive Identity Connector=3.2.0-patch6
Cisco Identity Services Engine Passive Identity Connector=3.2.0-patch7
Cisco Identity Services Engine Passive Identity Connector=3.2.0-patch8
Cisco Identity Services Engine Passive Identity Connector=3.2.0-patch9
Cisco Identity Services Engine Passive Identity Connector=3.3.0
Cisco Identity Services Engine Passive Identity Connector=3.3.0-patch1
Cisco Identity Services Engine Passive Identity Connector=3.3.0-patch10
Cisco Identity Services Engine Passive Identity Connector=3.3.0-patch2
Cisco Identity Services Engine Passive Identity Connector=3.3.0-patch3
Cisco Identity Services Engine Passive Identity Connector=3.3.0-patch4
Cisco Identity Services Engine Passive Identity Connector=3.3.0-patch5
Cisco Identity Services Engine Passive Identity Connector=3.3.0-patch6
Cisco Identity Services Engine Passive Identity Connector=3.3.0-patch7
Cisco Identity Services Engine Passive Identity Connector=3.3.0-patch8
Cisco Identity Services Engine Passive Identity Connector=3.3.0-patch9
Cisco Identity Services Engine Passive Identity Connector=3.4.0
Cisco Identity Services Engine Passive Identity Connector=3.4.0-patch1
Cisco Identity Services Engine Passive Identity Connector=3.4.0-patch2
Cisco Identity Services Engine Passive Identity Connector=3.4.0-patch3
Cisco Identity Services Engine Passive Identity Connector=3.4.0-patch4
Cisco Identity Services Engine Passive Identity Connector=3.4.0-patch5
Cisco Identity Services Engine Passive Identity Connector=3.5.0
Cisco Identity Services Engine Passive Identity Connector=3.5.0-patch1
Cisco Identity Services Engine Passive Identity Connector=3.5.0-patch2

Event History

Apr 15, 2026
CVE Published
via MITRE·04:03 PM
Data Sourced
via MITRE·04:03 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·05:17 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-20148?

CVE-2026-20148 is classified as a critical severity vulnerability.

2

How do I fix CVE-2026-20148?

To mitigate CVE-2026-20148, apply the latest security patches provided by Cisco for the affected Cisco Identity Services Engine and Cisco ISE-PIC.

3

Who is affected by CVE-2026-20148?

CVE-2026-20148 affects Cisco Identity Services Engine and Cisco ISE-PIC versions before the latest patches are applied.

4

What type of attacks can be performed using CVE-2026-20148?

CVE-2026-20148 allows authenticated remote attackers to perform path traversal attacks and read arbitrary files from the underlying operating system.

5

Is authentication required to exploit CVE-2026-20148?

Yes, an attacker must be authenticated to exploit CVE-2026-20148.

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