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Cisco Identity Services Engine Software CVE-2026-20136

| EUVDEUVD-2026-22960 MEDIUM
Improper Encoding or Escaping of Output (CWE-116)
2026-04-15 cisco
6.0
CVSS 3.1 · Vendor: cisco
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding for downstream
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 27, 2026

Privilege escalation to root in Cisco ISE CLI allows an authenticated local attacker with administrative privileges to inject and execute arbitrary commands on the underlying operating system. This command injection flaw stems from insufficient input validation in a specific CLI command, granting full control of the network access control appliance. No public exploit or active exploitation has been identified, and the EPSS score of 0.05% indicates very low likelihood of widespread exploitation.

Affected VersionsENISA

Cisco Identity Services Engine Software 3.1.0 p6
Cisco Identity Services Engine Software 3.5 Patch 1
Cisco Identity Services Engine Software 3.3 Patch 10
Cisco Identity Services Engine Software 3.3 Patch 4
Cisco Identity Services Engine Software 3.3 Patch 5
Cisco Identity Services Engine Software 3.2.0 p1
Cisco Identity Services Engine Software 3.4 Patch 5
Cisco Identity Services Engine Software 3.2.0 p7
Cisco Identity Services Engine Software 3.1.0 p10
Cisco Identity Services Engine Software 3.1.0 p8
Cisco Identity Services Engine Software 3.2.0 p6
Cisco Identity Services Engine Software 3.1.0 p1
Cisco Identity Services Engine Software 3.3 Patch 8
Cisco Identity Services Engine Software 3.3 Patch 7
Cisco Identity Services Engine Software 3.1.0 p3
Cisco Identity Services Engine Software 3.2.0 p5
Cisco Identity Services Engine Software 3.3 Patch 9
Cisco Identity Services Engine Software 3.1.0 p7
Cisco Identity Services Engine Software 3.2.0 p4
Cisco Identity Services Engine Software 3.3.0
Cisco Identity Services Engine Software 3.4 Patch 1
Cisco Identity Services Engine Software 3.2.0 p2
Cisco Identity Services Engine Software 3.4.0
Cisco Identity Services Engine Software 3.5 Patch 2
Cisco Identity Services Engine Software 3.3 Patch 2
Cisco Identity Services Engine Software 3.3 Patch 3
Cisco Identity Services Engine Software 3.4 Patch 3
Cisco Identity Services Engine Software 3.1.0
Cisco Identity Services Engine Software 3.1.0 p4
Cisco Identity Services Engine Software 3.3 Patch 6
Cisco Identity Services Engine Software 3.3 Patch 1
Cisco Identity Services Engine Software 3.1.0 p2
Cisco Identity Services Engine Software 3.1.0 p5
Cisco Identity Services Engine Software 3.1.0 p9
Cisco Identity Services Engine Software 3.4 Patch 2
Cisco Identity Services Engine Software 3.2.0
Cisco Identity Services Engine Software 3.2 Patch 9
Cisco Identity Services Engine Software 3.4 Patch 4
Cisco Identity Services Engine Software 3.2.0 p3
Cisco Identity Services Engine Software 3.5.0
Cisco Identity Services Engine Software 3.2 Patch 8

Affected Packages

euvd cisco_identity_services_engine_software no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (cisco) PRIMARY 6.0 MEDIUM
AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Primary rating from Vendor (cisco) · only source for this CVE.

CVSS VectorVendor: cisco

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

DescriptionCVE.org

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.

Threat Intelligence Overview

EPSS Score
0.1%
Top 85% exploitable
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.1%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Defer
Exploitation
None
System Exposure· derived
Small
Automatable
No
Human Impact· derived
Medium
Technical Impact
Total

Priority Score

30
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +30
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

OS command injection occurs when an application passes unsanitized user input directly into system shell commands.

CVE-2026-76460 CRITICAL POC
10.0 Sep 16

Authentication bypass in Cisco Identity Services Engine (ISE) and ISE Passive Identity Connector lets an unauthenticated

CVE-2026-76423 CRITICAL
10.0 Sep 16

Cisco ISE and Cisco ISE-PIC can be taken over by an unauthenticated, remote attacker who reaches the REST API web servic

CVE-2026-20192 CRITICAL
10.0 Sep 16

Improper access control vulnerabilities in Cisco Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-

CVE-2026-20130 CRITICAL
10.0 Sep 16

Remote, unauthenticated attackers with network access to Cisco Identity Services Engine (ISE) or ISE Passive Identity Co

CVE-2026-20186 CRITICAL
9.9 Apr 15

Command injection in Cisco Identity Services Engine (ISE) lets an authenticated remote attacker holding only Read-Only A

CVE-2026-20147 CRITICAL
9.9 Apr 15

Command injection in Cisco Identity Services Engine (ISE) and ISE Passive Identity Connector (PIC) allows authenticated

CVE-2026-20180 CRITICAL
9.9 Apr 15

Remote code execution and privilege escalation in Cisco Identity Services Engine allows authenticated attackers with Rea

CVE-2026-20181 CRITICAL
9.1 Jun 17

Authenticated remote command execution in Cisco Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-P

CVE-2026-20284 CRITICAL
9.1 Sep 16

SQL injection in the SXP REST API of Cisco Identity Services Engine (ISE) lets a remote attacker who already holds valid

CVE-2026-20176 CRITICAL
9.1 Sep 16

Command injection in Cisco Identity Services Engine (ISE) allows an authenticated, high-privileged remote administrator

CVE-2026-20237 CRITICAL
9.1 Sep 16

Improper input validation in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) all

CVE-2026-20194 CRITICAL
9.1 Sep 16

Cisco Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-PIC) contain multiple internally discovered

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