CVE-2026-20193 - Cisco Identity Services Engine Authentication Bypass Vulnerability

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MEDIUM

Cisco Identity Services Engine Authentication Bypass Vulnerability

Published May 6, 2026

4.3

MEDIUM

CVSS 3.1

EPSS 0.22%

Description

A vulnerability in the RADIUS Policy API endpoints of Cisco ISE could allow an authenticated, remote attacker with read-only Administrator privileges to gain unauthorized access to sensitive information on an affected device. This vulnerability is due to improper role-based access control (RBAC) permissions on the RADIUS Policy API endpoints. An attacker could exploit this vulnerability by bypassing the web-based management interface and directly calling an affected endpoint. A successful exploit could allow the attacker to gain unauthorized read access to sensitive RADIUS Policy details that are restricted for their role.

Affected products

Vendor Cisco Product Cisco Identity Services Engine Software Default
n/a
- Version
  3.3 Patch 1
  Status
  affected
  Constraints
  -
- Version
  3.3 Patch 10
  Status
  affected
  Constraints
  -
- Version
  3.3 Patch 2
  Status
  affected
  Constraints
  -
- Version
  3.3 Patch 3
  Status
  affected
  Constraints
  -
- Version
  3.3 Patch 4
  Status
  affected
  Constraints
  -
- Version
  3.3 Patch 5
  Status
  affected
  Constraints
  -
- Version
  3.3 Patch 6
  Status
  affected
  Constraints
  -
- Version
  3.3 Patch 7
  Status
  affected
  Constraints
  -
- Version
  3.3 Patch 8
  Status
  affected
  Constraints
  -
- Version
  3.3 Patch 9
  Status
  affected
  Constraints
  -
- Version
  3.3.0
  Status
  affected
  Constraints
  -
- Version
  3.4 Patch 1
  Status
  affected
  Constraints
  -
- Version
  3.4 Patch 2
  Status
  affected
  Constraints
  -
- Version
  3.4 Patch 3
  Status
  affected
  Constraints
  -
- Version
  3.4 Patch 4
  Status
  affected
  Constraints
  -
- Version
  3.4 Patch 5
  Status
  affected
  Constraints
  -
- Version
  3.4.0
  Status
  affected
  Constraints
  -
- Version
  3.5 Patch 1
  Status
  affected
  Constraints
  -
- Version
  3.5 Patch 2
  Status
  affected
  Constraints
  -
- Version
  3.5 Patch 3
  Status
  affected
  Constraints
  -
- Version
  3.5.0
  Status
  affected
  Constraints
  -

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

n/a

Version	Status	Constraints
3.3 Patch 1	affected	-
3.3 Patch 10	affected	-
3.3 Patch 2	affected	-
3.3 Patch 3	affected	-
3.3 Patch 4	affected	-
3.3 Patch 5	affected	-
3.3 Patch 6	affected	-
3.3 Patch 7	affected	-
3.3 Patch 8	affected	-
3.3 Patch 9	affected	-
3.3.0	affected	-
3.4 Patch 1	affected	-
3.4 Patch 2	affected	-
3.4 Patch 3	affected	-
3.4 Patch 4	affected	-
3.4 Patch 5	affected	-
3.4.0	affected	-
3.5 Patch 1	affected	-
3.5 Patch 2	affected	-
3.5 Patch 3	affected	-
3.5.0	affected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-862

Missing Authorization

References (2)

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-27862		Advisory
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-unauth-bypass-uxjRXGpb		Vendor Advisory