CVE-2026-20234 Cisco Identity Services Engine Hardening Release - Insuffiencently Protected Credential Vulnerabilities

Critical 9.9 Published 16 Sep 2026 Updated 17 Sep 2026

Attackers can access insufficiently protected credentials in Cisco ISE, potentially leading to data exposure or security bypasses.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-20234?

CVE-2026-20234 is a critical vulnerability in Cisco Identity Services Engine, published on 16 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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-2026-20234 are related to insufficiently protected credentials issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-522.

Weakness: CWE-522

Which versions are affected by CVE-2026-20234?

It affects 2 products.

Products include Cisco Identity Services Engine, Cisco Identity Services Engine Passive Identity Connector.

How do I fix CVE-2026-20234?

No fix has been published for CVE-2026-20234 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-20234 being exploited?

There is no known exploitation of CVE-2026-20234 in the wild and no public exploit code.

All Cisco Identity Services Engine vulnerabilities

Sources

Also known as GHSA-758h-wm5v-v89m.