AI and data stack advisories

Severe, 6 weeks1496Projects326

1496 severe, 6 weeks · 326 projects

CiscoCVE-2026-76423

Cisco ISE: authentication bypass by spoofing

Cisco

CVE-2026-76423 · Published Sep 16, 2026 · updated Sep 17, 2026

Critical10.0
No fix yet
Cisco advisory

A vulnerability in the REST API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to gain administrative access to an affected device.

This vulnerability is due to the REST API web service being exposed with insufficient authorization checks. An attacker could exploit this vulnerability by sending a crafted HTTP request to the exposed REST API port. A successful exploit could allow the attacker to read and modify ISE configuration and identity data with administrative privileges.

Affected versions

PackageAffectedFixed in
Cisco ISE Passive Identity Connector
Product
<= 3.2.0No fix yet
<= 3.1.0No fix yet
<= 3.3.0No fix yet
<= 3.4.0No fix yet
Cisco Identity Services Engine Software
Product
<= 3.1.0No fix yet
<= 3.1.0 p1No fix yet
<= 3.1.0 p3No fix yet
<= 3.1.0 p2No fix yet
Details and references

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