What is CVE-2026-20180?

CVE-2026-20180 is a critical-severity vulnerability in Cisco Identity Services Engine Software, classified under Path Traversal. CVSS score: 9.9/10. Published 2026-04-15.

How severe is CVE-2026-20180?

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

Is CVE-2026-20180 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Path Traversal in Cisco Identity Services Engine Software

CVE-2026-20180

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: Path Traversal (Directory Traversal)

EPSS: 0.005 (64.9th 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-22 — Path Traversal

Public proof-of-concept exploits

kaleth4/CVE-2026-20180

References

cisco-sa-ise-rce-4fverepv

Frequently asked questions

What is CVE-2026-20180?: CVE-2026-20180 is a critical-severity vulnerability in Cisco Identity Services Engine Software, classified under Path Traversal. CVSS score: 9.9/10. Published 2026-04-15.
How severe is CVE-2026-20180?: Critical severity. CVSS v3 base score is 9.9 out of 10.
Is CVE-2026-20180 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.