What is CVE-2026-20186?

CVE-2026-20186 is a critical-severity vulnerability in Cisco Identity Services Engine Software, classified under Command Injection. CVSS score: 9.9/10. Published 2026-04-15.

How severe is CVE-2026-20186?

Critical severity. CVSS v3 base score is 9.9 out of 10.

RCE in Cisco Identity Services Engine Software

CVE-2026-20186

A vulnerability in Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.004 (59.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Cisco Identity Services Engine Software — versions 3.1.0, 3.1.0 p1, 3.1.0 p3

Weakness classification (CWE)

CWE-77 — Command Injection

References

cisco-sa-ise-rce-4fverepv

Frequently asked questions

What is CVE-2026-20186?: CVE-2026-20186 is a critical-severity vulnerability in Cisco Identity Services Engine Software, classified under Command Injection. CVSS score: 9.9/10. Published 2026-04-15.
How severe is CVE-2026-20186?: Critical severity. CVSS v3 base score is 9.9 out of 10.