Riskcovery

CVE-2026-20237

Cisco Identity Services Engine Hardening Release - Input Validation Vulnerabilities

State
Published
Severity
9.1 Critical
Published
Sep 16, 2026
Updated
Sep 18, 2026
Reserved
Oct 8, 2025

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.19.1 CriticalCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:Hcisco

Weaknesses

  • CWE-20 Improper Input Validation

Affected Products

ProductVersions
Cisco Identity Services Engine SoftwareCisco
  • 3.1.0Affected
  • 3.1.0 p1Affected
  • 3.1.0 p3Affected
  • 3.1.0 p2Affected
  • 3.2.0Affected
  • 3.1.0 p4Affected
  • 3.1.0 p5Affected
  • 3.2.0 p1Affected
  • 3.1.0 p6Affected
  • 3.2.0 p2Affected
  • 3.1.0 p7Affected
  • 3.3.0Affected
  • 3.2.0 p3Affected
  • 3.2.0 p4Affected
  • 3.1.0 p8Affected
  • 3.2.0 p5Affected
  • 3.2.0 p6Affected
  • 3.1.0 p9Affected
  • 3.3 Patch 2Affected
  • 3.3 Patch 1Affected
  • 3.3 Patch 3Affected
  • 3.4.0Affected
  • 3.2.0 p7Affected
  • 3.3 Patch 4Affected
  • 3.4 Patch 1Affected
  • and 22 more versions
Cisco ISE Passive Identity ConnectorCisco
  • 3.2.0Affected
  • 3.1.0Affected
  • 3.3.0Affected
  • 3.4.0Affected
  • 3.5.0Affected

References

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