CVE-2026-76439Cisco Identity Services Engine Event Injection Vulnerability
Updated under an hour ago ()
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It affects Cisco Identity Services Engine Software and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weakness (CWE)
- CWE-306
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- cisco
- NVD analysis
- Analyzed
- Record last updated
- Sep 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Cisco Cisco Identity Services Engine Software cisco:identity_services_engine_software (from the name) | 3.1.0; 3.1.0 p1; 3.1.0 p3; 3.1.0 p2; 3.2.0; 3.1.0 p4; 3.1.0 p5; 3.2.0 p1; and 39 more ranges | CNA record |
Cisco Cisco ISE Passive Identity Connector cisco:ise_passive_identity_connector (from the name) | 3.2.0; 3.1.0; 3.3.0; 3.4.0; 3.5.0 | CNA record |
cisco identity_services_engine cisco:identity_services_engine | before 3.3.0; 3.3.0; 3.3.0; 3.3.0; 3.3.0; 3.3.0; 3.3.0; 3.3.0; and 15 more ranges | NVD |
cisco identity_services_engine_passive_identity_connector cisco:identity_services_engine_passive_identity_connector | before 3.3.0; 3.3.0; 3.3.0; 3.3.0; 3.3.0; 3.3.0; 3.3.0; 3.3.0; and 11 more ranges | NVD |
References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multiauth-bypass-sgD2HbL4vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.