CVE-2026-76439

Medium

Description

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.

SeverityMedium
CVSS5.3
Exploit probability—
ProductCisco Identity Services Engine
PublishedSep 16, 2026
First seenSep 16, 2026

How to fix

Update
  • cisco identity_services_engine3.3.0 or later
  • cisco identity_services_engine_passive_identity_connector3.3.0 or later

Affected products

ProductAffected versionsFixed in
cisco identity_services_enginev < 3.3.0, 3.3.0, 3.4.0, 3.5.03.3.0
cisco identity_services_engine_passive_identity_connectorv < 3.3.0, 3.3.0, 3.4.03.3.0

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