CVE-2026-20234 is a vulnerability in Cisco Identity Services Engine Software
Published on September 16, 2026
Cisco Identity Services Engine Hardening Release - Insuffiencently Protected Credential Vulnerabilities
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) engineering teams have conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-20234 are related to insufficiently protected credentials issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-522.
Vulnerability Analysis
CVE-2026-20234 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
Insufficiently Protected Credentials
The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.
Products Associated with CVE-2026-20234
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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.
- Version 3.3 Patch 11 is affected.
- Version 3.4 Patch 6 is affected.
- Version 3.2 Patch 10 is affected.
- Version 3.1.0 p72 is affected.
- Version 3.1.0 p11 is affected.
- Version 3.2.0 is affected.
- Version 3.1.0 is affected.
- Version 3.3.0 is affected.
- Version 3.4.0 is affected.
- Version 3.5.0 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.