CVE-2025-20337CiscoRouters and networkingJuly 28, 2025

Cisco Identity Services Engine Injection Vulnerability

Critical 10Actively exploited

Description

Cisco Identity Services Engine contains an injection vulnerability in a specific API of Cisco ISE and Cisco ISE-PIC due to insufficient validation of user-supplied input allowing an attacker to exploit this vulnerability by submitting a crafted API request. Successful exploitation could allow an attacker to perform remote code execution and obtaining root privileges on an affected device.

What to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

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Details

Vendor
Cisco
Product
Cisco Identity Services Engine
CVE
CVE-2025-20337
Affected versions
Cisco Identity Services Engine Software 3.3: 7 versions, from 3.3.0 to 3.3 Patch 6
Cisco Identity Services Engine Software 3.4: 3.4.0; 3.4 Patch 1
Cisco ISE Passive Identity Connector 3.2: 3.2.0
Cisco ISE Passive Identity Connector 3.1: 3.1.0
Cisco ISE Passive Identity Connector 3.3: 3.3.0
Cisco ISE Passive Identity Connector 3.4: 3.4.0 (from the advisory and NVD; check the exact builds in the official advisory)
CVSS score
10
Actively exploited
Yes, listed in the CISA Known Exploited Vulnerabilities catalog
CISA due date
August 18, 2025 (deadline for US federal agencies: a good benchmark for you too)
Source
CISA KEV – original advisory
Published
July 28, 2025

The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.

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