CVE-2026-20192

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.5% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-09-16 20:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-09-28 13:02 UTC Last updatedMost recent change to the record

Details

Published

2026-09-16 20:17 UTC

Last modified

2026-09-28 13:02 UTC

Exploit probability

0.5% · EPSS, next 30 days

Weakness

CWE-284 · Improper access control

Record status

Analyzed

Affected

• Cisco Identity Services Engine < 3.3.0
• Cisco Identity Services Engine 3.3.0
• Cisco Identity Services Engine 3.4.0
• Cisco Identity Services Engine 3.5.0
• Cisco Identity Services Engine Passive Identity Connector < 3.3.0
• Cisco Identity Services Engine Passive Identity Connector 3.3.0
• Cisco Identity Services Engine Passive Identity Connector 3.4.0

Attack profile CVSS 3.1 · 10.0

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High