CVE-2026-20309

CVE CVE-2026-20309EUVD EUVD-2026-81146Published 2026-09-16T20:17:58.000ZLast changed 2026-09-17T14:07:18.000ZCVSS 6.1

What the advisory describes

A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to conduct a reflected cross-site scripting (XSS) attack against a user of the interface. This vulnerability exists because the web-based management interface does not properly validate user-supplied input. An attacker could exploit this vulnerability by persuading a user of the interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information.

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