Cisco Identity Services Engine Hardening Release - Input Validation Vulnerabilities (CVE-2026-20237) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-20237

Cisco Identity Services Engine Hardening Release - Input Validation Vulnerabilities

Answer in brief

CVE-2026-20237 records a Unknown severity vulnerability in Cisco Identity Services Engine Hardening Release - Input Validation Vulnerabilities. The current sources do not mark it as known exploited. The current feed maps Cisco/Cisco Identity Services Engine Software (generic), Cisco/Cisco ISE Passive Identity Connector (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Cisco/Cisco Identity Services Engine Software (generic), Cisco/Cisco ISE Passive Identity Connector (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Cisco/Cisco Identity Services Engine Softwaregeneric	3.1.0 \|\| 3.1.0 p1 \|\| 3.1.0 p3 \|\| 3.1.0 p2 \|\| 3.2.0 \|\| 3.1.0 p4 \|\| 3.1.0 p5 \|\| 3.2.0 p1 \|\| 3.1.0 p6 \|\| 3.2.0 p2 \|\| 3.1.0 p7 \|\| 3.3.0 \|\| 3.2.0 p3 \|\| 3.2.0 p4 \|\| 3.1.0 p8 \|\| 3.2.0 p5 \|\| 3.2.0 p6 \|\| 3.1.0 p9 \|\| 3.3 Patch 2 \|\| 3.3 Patch 1 \|\| 3.3 Patch 3 \|\| 3.4.0 \|\| 3.2.0 p7 \|\| 3.3 Patch 4 \|\| 3.4 Patch 1 \|\| 3.1.0 p10 \|\| 3.3 Patch 5 \|\| 3.3 Patch 6 \|\| 3.4 Patch 2 \|\| 3.3 Patch 7 \|\| 3.4 Patch 3 \|\| 3.5.0 \|\| 3.4 Patch 4 \|\| 3.3 Patch 8 \|\| 3.2 Patch 8 \|\| 3.5 Patch 1 \|\| 3.3 Patch 9 \|\| 3.2 Patch 9 \|\| 3.4 Patch 5 \|\| 3.5 Patch 3 \|\| 3.5 Patch 2 \|\| 3.3 Patch 10 \|\| 3.3 Patch 11 \|\| 3.4 Patch 6 \|\| 3.2 Patch 10 \|\| 3.1.0 p72 \|\| 3.1.0 p11	Not reported
Cisco/Cisco ISE Passive Identity Connectorgeneric	3.2.0 \|\| 3.1.0 \|\| 3.3.0 \|\| 3.4.0 \|\| 3.5.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Cisco/Cisco Identity Services Engine Software, Cisco/Cisco ISE Passive Identity Connector.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Source referencesec.cloudapps.cisco.com

Upstream source description

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-2026-20237 are related to improper input validation issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-20.

Quoted source text, attributed separately from HOL analysis.