CiscoCVE-2026-76439
Cisco ISE Passive Identity Connector: missing authentication
Medium5.3CVE-2026-76439 · Published Sep 16, 2026 · updated Sep 18, 2026
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
| Package | Affected | Fixed in |
|---|---|---|
| Cisco ISE Passive Identity Connector Product | <= 3.2.0 | No fix yet |
| <= 3.1.0 | No fix yet | |
| <= 3.3.0 | No fix yet | |
| <= 3.4.0 | No fix yet | |
| Cisco Identity Services Engine Software Product | <= 3.1.0 | No fix yet |
| <= 3.1.0 p1 | No fix yet | |
| <= 3.1.0 p3 | No fix yet | |
| <= 3.1.0 p2 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-306
More Cisco advisories
All Cisco| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 16 | Cisco ISE Passive Identity Connector: SQL injection | Medium4.9 | No fix yet |
| Sep 16 | Cisco ISE Passive Identity: authenticated, remote attacker could conduct an SQL... | Medium4.9 | No fix yet |
| Sep 16 | Cisco ISE Passive Identity: authenticated, remote attacker could conduct an SQL... | Medium4.9 | No fix yet |
| Sep 16 | Cisco ISE Passive Identity Connector: authentication bypass | Critical10.0 | No fix yet |
| Sep 16 | Cisco ISE Passive Identity Connector: XML external entity | Medium4.9 | No fix yet |
| Sep 16 | Cisco ISE Passive Identity Connector: missing authentication | Medium5.3 | No fix yet |