Auth bypass in Cisco Identity Services Engine Software

CVE-2026-20285

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 modify parts of the configuration on an affected device. This vulnerability is due to the lack of server-side validation of Administrator permissions. An attacker could exploit this vulnerability by submitting a crafted HTTP request to an affected system. A successful exploit could allow the attacker to modify descriptions of files on a specific page. To exploit this vulnerability, an attacker would need valid Administrator credentials.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-20285?
CVE-2026-20285 is a medium-severity vulnerability in Cisco Identity Services Engine Software, classified under Improper Authorization. CVSS score: 4.3/10. Published 2026-09-16.
How severe is CVE-2026-20285?
Medium severity. CVSS v3 base score is 4.3 out of 10.