CVE-2026-76439
Last modified
CVE-2026-76439 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.32% chance of exploitation in the next 30 days.
Description
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Cisco | Identity Services Engine | < 3.3.0 | — |
| Cisco | Identity Services Engine | 3.3.0 | Patch1 |
| Cisco | Identity Services Engine | 3.4.0 | — |
| Cisco | Identity Services Engine | 3.5.0 | — |
| Cisco | Identity Services Engine Passive Identity Connector | < 3.3.0 | — |
| Cisco | Identity Services Engine Passive Identity Connector | 3.3.0 | Patch1 |
| Cisco | Identity Services Engine Passive Identity Connector | 3.4.0 | — |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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