What is CVE-2026-20047?

CVE-2026-20047 is a medium-severity vulnerability in Cisco Identity Services Engine Software, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 4.8/10. Published 2026-01-15.

How severe is CVE-2026-20047?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Cisco Identity Services Engine Software

CVE-2026-20047

A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an authenticated, remote attacker to conduct cross-site scripting (XSS) attacks ag…

EPSS: 0.002 (14.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

Affected products

Cisco Identity Services Engine Software — versions 3.1.0, 3.1.0 p1, 3.1.0 p3
Cisco Identity_services_engine — versions 3.2.0, 3.3.0, 3.4.0

Weakness classification (CWE)

CWE-80 — Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

References

psirt@cisco.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-20047?: CVE-2026-20047 is a medium-severity vulnerability in Cisco Identity Services Engine Software, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 4.8/10. Published 2026-01-15.
How severe is CVE-2026-20047?: Medium severity. CVSS v3 base score is 4.8 out of 10.