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    CVE-2026-76439

    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.

    Published:Sep 16, 2026
    Last Modified:Sep 28, 2026
    EPS:Sep 16, 2026
    EPSS Score:0.00324
    CVSS Score:5.3

    Affected Products

    Vendor
    Cisco
    Product
    Identity Services Engine
    Vendor
    Cisco
    Product
    Identity Services Engine Passive Identity Connector
    Vendor
    Cisco
    Product
    Identity Services Engine Software

    Exploits

    No exploit reference

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High