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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (41.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Cisco Identity Services Engine Software — versions 3.1.0, 3.1.0 p1, 3.1.0 p10
- Cisco Ise Passive Identity Connector — versions 3.1.0, 3.2.0, 3.3.0
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.