Auth bypass in Cisco Identity Services Engine Software
CVE-2026-20190
A vulnerability in Cisco ISE and ISE-PIC could allow an unauthenticated, remote attacker to view sensitive information on an affected device. This vulnerability is due to improper authorization checks when a resource is accessed. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to gain access to sensitive information, including hashed credentials that could be used in future attacks.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (40.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Cisco Identity Services Engine Software — versions 3.4.0, 3.4 Patch 1, 3.4 Patch 2
- Cisco Ise Passive Identity Connector — versions 3.4.0
- Cisco Identity Services Engine — versions 3.4.0, 3.5.0
- Cisco Identity Services Engine Passive Connector — versions 3.4.0, 3.5.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-20190?
- CVE-2026-20190 is a high-severity vulnerability in Cisco Identity Services Engine Software, classified under Improper Authorization. CVSS score: 7.5/10. Published 2026-06-17.
- How severe is CVE-2026-20190?
- High severity. CVSS v3 base score is 7.5 out of 10.