CVE-2026-20234

CRITICAL CVSS 3.1: 9.9 EPSS 0.37%
Updated Sep 28, 2026
Cisco
Parameter Value
CVSS 9.9 (CRITICAL)
Affected Versions 3.1.0 — 3.3.0
Fixed In 3.3.0
Type CWE-522 (Insufficiently Protected Credentials)
Vendor Cisco
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products 42

Configuration From (including) Up to (excluding)
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:*:*:*:*:*:*:*:*
3.1.0 3.3.0
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch1:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch10:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch11:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch2:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch3:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch4:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch5:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch6:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch7:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch8:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.3.0:patch9:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.4.0:-:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch1:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch2:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch3:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch4:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch5:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.4.0:patch6:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.5.0:-:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.5.0:patch1:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.5.0:patch2:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine
cpe:2.3:a:cisco:identity_services_engine:3.5.0:patch3:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:*:*:*:*:*:*:*:*
3.1.0 3.3.0
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch1:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch10:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch11:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch2:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch3:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch4:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch5:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch6:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch7:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch8:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.3.0:patch9:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.4.0:-:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.4.0:patch1:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.4.0:patch2:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.4.0:patch3:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.4.0:patch4:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.4.0:patch5:*:*:*:*:*:*
— —
Cisco Identity_Services_Engine_Passive_Identity_Connector
cpe:2.3:a:cisco:identity_services_engine_passive_identity_connector:3.4.0:patch6:*:*:*:*:*:*
— —