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.
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
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Identity Services Engine Software | 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; 3.1.0 p6; 3.2.0 p2; 3.1.0 p7; 3.3.0; 3.2.0 p3; 3.2.0 p4; 3.1.0 p8; 3.2.0 p5; 3.2.0 p6; 3.1.0 p9; 3.3 Patch 2; 3.3 Patch 1; 3.3 Patch 3; 3.4.0; 3.2.0 p7; 3.3 Patch 4; 3.4 Patch 1; 3.1.0 p10; 3.3 Patch 5; 3.3 Patch 6; 3.4 Patch 2; 3.3 Patch 7; 3.4 Patch 3; 3.5.0; 3.4 Patch 4; 3.3 Patch 8; 3.2 Patch 8; 3.5 Patch 1; 3.3 Patch 9; 3.2 Patch 9; 3.4 Patch 5; 3.5 Patch 3; 3.5 Patch 2; 3.3 Patch 10; 3.3 Patch 11; 3.4 Patch 6; 3.2 Patch 10; 3.1.0 p72; 3.1.0 p11 |
| Cisco | Cisco ISE Passive Identity Connector | 3.2.0; 3.1.0; 3.3.0; 3.4.0; 3.5.0 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-76439?
How severe is CVE-2026-76439?
How do I fix CVE-2026-76439?
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.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-7643A flaw has been found in ChatGPTNextWeb NextChat up to 2.16.…4.3
- CVE-2026-76431A vulnerability in the file management function of the web-b…4.9
- CVE-2026-76432A vulnerability in the web-based management interface of Cis…4.9
- CVE-2026-76433A vulnerability in the client provisioning download feature …5.3
- CVE-2026-76434A vulnerability in the certificate import functionality of t…4.9
- CVE-2026-76438A vulnerability in the web-based management interface of Cis…6.5
- CVE-2026-7644A vulnerability has been found in ChatGPTNextWeb NextChat up…7.3
- CVE-2026-76440As part of Cisco's ongoing commitment to proactive security …9.8
- CVE-2026-76441As part of Cisco's ongoing commitment to proactive security …9.8
- CVE-2026-76442As part of Cisco's ongoing commitment to proactive security …7.5
- CVE-2026-76443As part of Cisco's ongoing commitment to proactive security …9.8
- CVE-2026-76444A vulnerability in an internal service of Cisco ISE and Cisc…5.3
Are you affected by CVE-2026-76439?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST