What is CVE-2026-20136?

CVE-2026-20136 is a medium-severity vulnerability in Cisco Identity Services Engine Software, classified under Improper Encoding or Escaping of Output. CVSS score: 6.0/10. Published 2026-04-15.

How severe is CVE-2026-20136?

Medium severity. CVSS v3 base score is 6.0 out of 10.

Vulnerability in Cisco Identity Services Engine Software

CVE-2026-20136

A vulnerability in the CLI of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an authenticated, local attacker with administrative privileges to perform a command injection attack on…

EPSS: 0.005 (39.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.

Affected products

Cisco Identity Services Engine Software — versions 3.1.0, 3.1.0 p1, 3.1.0 p3
Cisco Identity_services_engine — versions 3.3.0, 3.4.0, 3.5.0
Cisco Identity_services_engine_passive_identity_connector — versions 3.3.0, 3.4.0, 3.5.0

Weakness classification (CWE)

CWE-116 — Improper Encoding or Escaping of Output

References

psirt@cisco.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-20136?: CVE-2026-20136 is a medium-severity vulnerability in Cisco Identity Services Engine Software, classified under Improper Encoding or Escaping of Output. CVSS score: 6.0/10. Published 2026-04-15.
How severe is CVE-2026-20136?: Medium severity. CVSS v3 base score is 6.0 out of 10.