CVE-2026-76439
published 2026-09-16CVE-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…
PriorityP336medium5.3CVSS 3.1
AVNACLPRNUINSUCNILAN
EPSS
0.32%
24.2th percentile
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
94 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
| cisco | cisco_identity_services_engine_software | — | — |
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GHSA
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
ghsa_unreviewed·2026-09-16
CVE-2026-76439 [MEDIUM] CWE-306 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
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.
VulDB
Cisco Identity Services Engine Guest Portal Endpoint Posture Status Reporting improper authentication
vuldb·2026-09-16·CVSS 5.3
CVE-2026-76439 [MEDIUM] Cisco Identity Services Engine Guest Portal Endpoint Posture Status Reporting improper authentication
A vulnerability was found in Cisco Identity Services Engine and ISE Passive Identity Connector. It has been classified as problematic. The impacted element is an unknown function of the component Guest Portal Endpoint Posture Status Reporting. Performing a manipulation results in improper authentication.
This vulnerability is known as CVE-2026-76439. Remote exploitation of the attack is possible. No exploit is available.
Upgrading the affected component is recommended.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-09-16
Published