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CVE-2026-20192

Cisco Identity Services Engine Hardening Release - Access Control Vulnerabilities

Published: Sep 16, 2026Updated: Sep 18, 2026 Sources: CVE List NVDCWE-284
10.0CRITICAL
NVD MITRE
EPSS Score
0.4%
Top 63.1%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
No Fix Available
Self-Check
Not available

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-2026-20192 are related to improper access control issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-284.

In plain language

AI Act now

Cisco Identity Services Engine has a critical security weakness with a public exploit, so small businesses using it should act now.

Executive summary

CVE-2026-20192 is a CVSS 10.0 improper-access-control vulnerability affecting Cisco Identity Services Engine and Cisco ISE Passive Identity Connector, with public exploit code available.

If affected, business impact
Identity system takeoverUnauthorized network accessCustomer data exposureBusiness service disruptionRansomware risk

What to do now

  1. Check whether your organization runs Cisco Identity Services Engine or Cisco ISE Passive Identity Connector.
  2. Ask Cisco or your support provider whether a hardening release addressing CVE-2026-20192 is available; no fixed version has been published in the supplied findings.
  3. Until guidance is available, restrict network access to these systems to trusted administrators and required internal services.
  4. Review administrator accounts and investigate unexpected configuration, access-policy, or identity-service changes.
May need vendor / contractor work

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-284

Affected Products

Cisco
commercial·USaka cisco systems inc., cisco systems
Cisco Identity Services Engine Software
Networking Infrastructure
Cisco ISE Passive Identity Connector
Networking Infrastructure

Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Is your org exposed to CVE-2026-20192?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-ise-XU5EwX5T
sec.cloudapps.cisco.com
News mentions
1

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