CVE-2026-20241

Cisco Identity Services Engine Authorization Bypass Vulnerability

Published Nov 4, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

Description

A vulnerability in the authorization mechanism of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an unauthenticated, remote attacker to obtain an endpoint identity certificate.

This vulnerability is due to improper authorization checks. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to bypass authorization to obtain an endpoint certificate.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

Cisco Identity Services Engine Software

unknown

Version	Status	Constraints
`3.1.0`	affected	—
`3.1.0 p1`	affected	—
`3.1.0 p3`	affected	—
`3.1.0 p2`	affected	—
`3.2.0`	affected	—
`3.1.0 p4`	affected	—
`3.1.0 p5`	affected	—
`3.2.0 p1`	affected	—
`3.1.0 p6`	affected	—
`3.2.0 p2`	affected	—
`3.1.0 p7`	affected	—
`3.3.0`	affected	—
`3.2.0 p3`	affected	—
`3.2.0 p4`	affected	—
`3.1.0 p8`	affected	—
`3.2.0 p5`	affected	—
`3.2.0 p6`	affected	—
`3.1.0 p9`	affected	—
`3.3 Patch 2`	affected	—
`3.3 Patch 1`	affected	—
`3.3 Patch 3`	affected	—
`3.4.0`	affected	—
`3.2.0 p7`	affected	—
`3.3 Patch 4`	affected	—
`3.4 Patch 1`	affected	—
`3.1.0 p10`	affected	—
`3.3 Patch 5`	affected	—
`3.3 Patch 6`	affected	—
`3.4 Patch 2`	affected	—
`3.3 Patch 7`	affected	—
`3.4 Patch 3`	affected	—
`3.5.0`	affected	—
`3.4 Patch 4`	affected	—
`3.3 Patch 8`	affected	—
`3.2 Patch 8`	affected	—
`3.5 Patch 1`	affected	—
`3.3 Patch 9`	affected	—
`3.2 Patch 9`	affected	—
`3.4 Patch 5`	affected	—
`3.5 Patch 3`	affected	—
`3.5 Patch 2`	affected	—
`3.3 Patch 10`	affected	—
`3.3 Patch 11`	affected	—
`3.4 Patch 6`	affected	—
`3.2 Patch 10`	affected	—
`3.1.0 p11`	affected	—

Cisco

Cisco ISE Passive Identity Connector

unknown

Version	Status	Constraints
`3.2.0`	affected	—
`3.1.0`	affected	—
`3.3.0`	affected	—
`3.4.0`	affected	—
`3.5.0`	affected	—

No data.

Vendor Product Versions

Cisco

Identity Services Engine Passive Identity Connector

Version	Status	Scheme	Platform
`3.2.0`	affected	semver	—
`3.1.0`	affected	semver	—
`3.3.0`	affected	semver	—
`3.4.0`	affected	semver	—
`3.5.0`	affected	semver	—

Cisco

Identity Services Engine Software

Version	Status	Scheme	Platform
`3.1.0`	affected	semver	—
`3.1.0 p1`	affected	generic	—
`3.1.0 p3`	affected	generic	—
`3.1.0 p2`	affected	generic	—
`3.2.0`	affected	semver	—
`3.1.0 p4`	affected	generic	—
`3.1.0 p5`	affected	generic	—
`3.2.0 p1`	affected	generic	—
`3.1.0 p6`	affected	generic	—
`3.2.0 p2`	affected	generic	—
`3.1.0 p7`	affected	generic	—
`3.3.0`	affected	semver	—
`3.2.0 p3`	affected	generic	—
`3.2.0 p4`	affected	generic	—
`3.1.0 p8`	affected	generic	—
`3.2.0 p5`	affected	generic	—
`3.2.0 p6`	affected	generic	—
`3.1.0 p9`	affected	generic	—
`3.3 Patch 2`	affected	generic	—
`3.3 Patch 1`	affected	generic	—
`3.3 Patch 3`	affected	generic	—
`3.4.0`	affected	semver	—
`3.2.0 p7`	affected	generic	—
`3.3 Patch 4`	affected	generic	—
`3.4 Patch 1`	affected	generic	—
`3.1.0 p10`	affected	generic	—
`3.3 Patch 5`	affected	generic	—
`3.3 Patch 6`	affected	generic	—
`3.4 Patch 2`	affected	generic	—
`3.3 Patch 7`	affected	generic	—
`3.4 Patch 3`	affected	generic	—
`3.5.0`	affected	semver	—
`3.4 Patch 4`	affected	generic	—
`3.3 Patch 8`	affected	generic	—
`3.2 Patch 8`	affected	generic	—
`3.5 Patch 1`	affected	generic	—
`3.3 Patch 9`	affected	generic	—
`3.2 Patch 9`	affected	generic	—
`3.4 Patch 5`	affected	generic	—
`3.5 Patch 3`	affected	generic	—
`3.5 Patch 2`	affected	generic	—
`3.3 Patch 10`	affected	generic	—
`3.3 Patch 11`	affected	generic	—
`3.4 Patch 6`	affected	generic	—
`3.2 Patch 10`	affected	generic	—
`3.1.0 p11`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.249% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-cert-mE9BD5GO

History

Nov 4, 2026 7:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Nov 4, 2026 7:00 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Cisco Cisco identity Services Engine Passive Identity Connector Cisco identity Services Engine Software
Vendors & Products		Cisco Cisco identity Services Engine Passive Identity Connector Cisco identity Services Engine Software

Nov 4, 2026 4:45 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		A vulnerability in the authorization mechanism of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an unauthenticated, remote attacker to obtain an endpoint identity certificate. This vulnerability is due to improper authorization checks. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to bypass authorization to obtain an endpoint certificate.
Title		Cisco Identity Services Engine Authorization Bypass Vulnerability
Weaknesses		CWE-285
References		https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-cert-mE9BD5GO
Metrics		cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}`