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 the underlying operating system and elevate privileges to root. This vulnerability is due to insufficient validation of user supplied input. An attacker could exploit this vulnerability by providing crafted input to a specific CLI command. A successful exploit could allow the attacker to elevate their privileges to root on the underlying operating system.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.005 (41.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.5% 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 3.1.0, 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 Connector — versions 3.3.0, 3.4.0, 3.5.0
Weakness classification (CWE)
References
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.