CVE-2026-20193 Cisco Identity Services Engine Authentication Bypass Vulnerability

Medium 4.3 Published 6 May 2026 Updated 6 May 2026

Authenticated attackers with read-only admin privileges can bypass RBAC to access sensitive RADIUS Policy details via API endpoints.

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-2026-20193?

CVE-2026-20193 is a medium-severity missing authorization vulnerability in Cisco Identity Services Engine, published on 6 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability in the RADIUS Policy API endpoints of Cisco ISE could allow an authenticated, remote attacker with read-only Administrator privileges to gain unauthorized access to sensitive information on an affected device. This vulnerability is due to improper role-based access control (RBAC) permissions on the RADIUS Policy API endpoints. An attacker could exploit this vulnerability by bypassing the web-based management interface and directly calling an affected endpoint. A successful exploit could allow the attacker to gain unauthorized read access to sensitive RADIUS Policy details that are restricted for their role.

Weakness: CWE-862

Which versions are affected by CVE-2026-20193?

It affects 1 product.

Products include Cisco Identity Services Engine.

How do I fix CVE-2026-20193?

No fix has been published for CVE-2026-20193 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-20193 being exploited?

There is no known exploitation of CVE-2026-20193 in the wild and no public exploit code.

All Cisco Identity Services Engine vulnerabilities

Sources

Also known as GHSA-qwrq-5c2q-3p3m.