CVE-2026-20195

MEDIUM EPSS 19.2%
Published May 6, 20261mo ago · Modified Jun 29, 2026today
5.3 CVSS 3.1
Medium
Find Similar
Published May 6, 2026 1mo ago
Last Modified Jun 29, 2026 today

Description

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.

CVSS Details

Base Score
5.3
Exploitability
3.9
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
19.2% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-204

Affected Products 21

VendorProductVersionRange
ciscoidentity_services_engine* ≤3.2.0
ciscoidentity_services_engine3.3.0any
ciscoidentity_services_engine3.3.0any
ciscoidentity_services_engine3.3.0any
ciscoidentity_services_engine3.3.0any
ciscoidentity_services_engine3.3.0any
ciscoidentity_services_engine3.3.0any
ciscoidentity_services_engine3.3.0any
ciscoidentity_services_engine3.3.0any
ciscoidentity_services_engine3.3.0any
ciscoidentity_services_engine3.3.0any
ciscoidentity_services_engine3.3.0any
ciscoidentity_services_engine3.4.0any
ciscoidentity_services_engine3.4.0any
ciscoidentity_services_engine3.4.0any
ciscoidentity_services_engine3.4.0any
ciscoidentity_services_engine3.4.0any
ciscoidentity_services_engine3.4.0any
ciscoidentity_services_engine3.5.0any
ciscoidentity_services_engine3.5.0any
ciscoidentity_services_engine3.5.0any

References 1

  • sec.cloudapps.cisco.com https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-unauth-bypass-uxjRXGpb
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.