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Cisco Identity Services Engine Multiple Vulnerabilities (cisco-sa-ise-unauth-bypass-uxjRXGpb)

medium Nessus Plugin ID 312647

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

According to its self-reported version, Cisco ISE is affected by multiple vulnerabilities.

 - A vulnerability in an identity management API endpoint of Cisco ISE could allow an unauthenticated, remote attacker to enumerate valid user accounts on an affected device. This vulnerability exists because error messages are observed when the affected API endpoint is called. An attacker could exploit this vulnerability by sending a series of crafted requests to the affected endpoint and analyzing the differentiated responses. A successful exploit could allow the attacker to compile a list of valid usernames on an affected system. (CVE-2026-20195)

 - A vulnerability in the RADIUS Policy API endpoints of Cisco ISE could allow anauthenticated, 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 unauthorizedread access to sensitive RADIUS Policy details that are restricted for their role. (CVE-2026-20193)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCwr77441, CSCwr77445

See Also

http://www.nessus.org/u?0d8af4bf

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwr77441

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwr77445

Plugin Details

Severity: Medium

ID: 312647

File Name: cisco-sa-ise-unauth-bypass-uxjRXGpb.nasl

Version: 1.1

Type: Local

Family: CISCO

Published: 5/6/2026

Updated: 5/6/2026

Supported Sensors: Nessus

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2026-20195

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/h:cisco:identity_services_engine, cpe:/a:cisco:identity_services_engine, cpe:/a:cisco:identity_services_engine_software

Required KB Items: Host/Cisco/ISE/version

Exploit Ease: No known exploits are available

Patch Publication Date: 5/6/2026

Vulnerability Publication Date: 5/6/2026

Reference Information

CVE: CVE-2026-20193, CVE-2026-20195