CVE-2021-1134

A vulnerability in the Cisco Identity Services Engine (ISE) integration feature of the Cisco DNA Center Software could allow an unauthenticated, remote attacker to gain unauthorized access to sensitive data. The vulnerability is due to an incomplete validation of the X.509 certificate used when establishing a connection between DNA Center and an ISE server. An attacker could exploit this vulnerability by supplying a crafted certificate and could then intercept communications between the ISE and DNA Center. A successful exploit could allow the attacker to view and alter sensitive information that the ISE maintains about clients that are connected to the network.

CVSS v3 7.4 HIGH
CVSS v2.0 5.8 MEDIUM

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

5.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:N

Exploitability : 8.6 / Impact : 4.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnac-certvalid-USEj2CZk	Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-dnac-certvalid-USEj2CZk	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:cisco:catalyst_center:*:*:*:*:*:*:*:*

History

23 Jul 2025, 15:26

Type	Values Removed	Values Added
First Time		Cisco catalyst Center
CPE	cpe:2.3:a:cisco:dna_center::::::::	cpe:2.3:a:cisco:catalyst_center::::::::

Information

Published : 2021-06-29 03:15

Updated : 2025-07-23 15:26

NVD link : CVE-2021-1134

Mitre link : CVE-2021-1134

CVE.ORG link : CVE-2021-1134

JSON object : View

Products Affected

cisco

catalyst_center

CWE

CWE-295

Improper Certificate Validation

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