CVE-2026-76439

CVE CVE-2026-76439EUVD EUVD-2026-81142Published 2026-09-16T20:17:47.000ZLast changed 2026-09-18T14:46:10.000ZCVSS 5.3

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Cisco — Cisco ISE Passive Identity Connector 3.3.0; 3.1.0; 3.4.0; 3.5.0; 3.2.0
Cisco — Cisco Identity Services Engine Software 3.3 Patch 4; 3.1.0 p5; 3.1.0 p11; 3.3 Patch 6; 3.1.0; 3.1.0 p6; 3.3 Patch 10; 3.2.0 p3; 3.1.0 p2; 3.3 Patch 11; 3.2.0 p1; 3.1.0 p7; 3.2.0 p7; 3.1.0 p4; 3.3.0; 3.5 Patch 2; 3.3 Patch 1; 3.5 Patch 3; 3.2.0 p2; 3.3 Patch 2; 3.1.0 p9; 3.1.0 p72; 3.4 Patch 5; 3.2.0; 3.3 Patch 5; 3.4 Patch 3; 3.3 Patch 9; 3.2 Patch 10; 3.1.0 p10; 3.4 Patch 2; 3.3 Patch 7; 3.4 Patch 1; 3.5 Patch 1; 3.1.0 p3; 3.2.0 p6; 3.1.0 p8; 3.1.0 p1; 3.2 Patch 9; 3.5.0; 3.4.0; 3.4 Patch 4; 3.3 Patch 8; 3.4 Patch 6; 3.2 Patch 8; 3.2.0 p5; 3.2.0 p4; 3.3 Patch 3

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Cisco — Identity Services Engine Software

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