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Cisco Identity Services Engine Software EUVDEUVD-2026-22970

| CVE-2026-20180 CRITICAL
Path Traversal (CWE-22)
2026-04-15 cisco
9.9
CVSS 3.1 · Vendor: cisco
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling Path canonicalization, traversal prevention
MITRE ATT&CK

2 techniques across 2 tactics: Discovery, Collection

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 26, 2026

Remote code execution and privilege escalation in Cisco Identity Services Engine allows authenticated attackers with Read Only Admin privileges to execute arbitrary operating system commands via crafted HTTP requests, resulting in full root access. The vulnerability, rated 9.9 (Critical), impacts multiple ISE versions; in single-node deployments, the affected device may become unavailable, causing denial of service. No active exploitation (KEV) or public exploit code has been identified, and the EPSS score of 0.21% indicates low likelihood of widespread attacks.

Affected VersionsENISA

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

Affected Packages

euvd cisco_identity_services_engine_software no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (cisco) PRIMARY 9.9 CRITICAL
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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

CVSS VectorVendor: cisco

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

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 have at least Read Only Admin credentials.

This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root. In single-node ISE deployments, successful exploitation of these vulnerabilities could cause the affected ISE node to become unavailable, resulting in a denial of service (DoS) condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored.

Threat Intelligence Overview

EPSS Score
0.2%
Top 56% exploitable
Threat Intel
1
1 source
Data Quality
6 sources
Confidence: High
EUVD NVD CVE.org EPSS Vulnrichment NEWS VulDB

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 CRITICAL
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
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
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Total

Priority Score

50
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +50
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Path traversal exploits occur when applications use user-controlled input to construct file system paths without proper validation.

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

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-2026-20181 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

CVE-2026-20211 CRITICAL
9.1 Sep 16

Root-level command execution on Cisco Identity Services Engine (ISE) is achievable by an authenticated, high-privileged

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