CVE-2026-76439

MEDIUM CVSS 3.1: 5.3 EPSS 0.32%
Updated Sep 18, 2026
Cisco
Parameter Value
CVSS 5.3 (MEDIUM)
Type CWE-306 (Missing Authentication for Critical Function)
Vendor Cisco
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v3.1