AI and data stack advisories

Severe, 6 weeks1496Projects326

1496 severe, 6 weeks · 326 projects

CiscoCVE-2026-76439

Cisco Identity Services Engine Software: missing authentication

Cisco

CVE-2026-76439 · Published Sep 16, 2026 · updated Sep 28, 2026

Medium5.3
No fix yet
Cisco advisory

A vulnerability in the endpoint posture status reporting functionality of the guest portal web application of Cisco ISE could allow an unauthenticated, remote attacker to submit forged posture status events into the endpoint posture pipeline.

This vulnerability is due to insufficient authentication on an internal interface that is exposed through the guest portal. An attacker could exploit this vulnerability by sending a crafted request to an affected system. A successful exploit could allow the attacker to manipulate the posture status on the affected system.

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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