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TI-2021-00861 Aliases CVE-2021-1134GHSA-c46x-8q9c-r3vx

Cisco DNA Center Certificate Validation Vulnerability

Priority LOW 36CWE-295Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Spoofing
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-295.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00774 55th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Digital Network Architecture Center (DNA Center)all versions—No fix listedCNA
  • Cisco Digital Network Architecture Center (DNA Center) VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cisco:catalyst_center:*:*:*:*:*:*:*:*before 2.2.2.1VulnerableCisco
  • cpe:2.3:a:cisco:catalyst_center:*:*:*:*:*:*:*:* Versions before 2.2.2.1 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-1134
  2. 2026-10-03 Alias added: GHSA-c46x-8q9c-r3vx

References

Advisory 1

  • TI-2021-00991 Cisco DNA Center Command Runner Command Injection Vulnerability CVSS 3.1CRITICAL 9.6
  • TI-2020-02961 Cisco DNA Center Information Disclosure Vulnerability CVSS 3.1HIGH 7.5
  • TI-2019-01464 Cisco DNA Center Unintended Proxy Via SWIM Import Interface Vulnerability CVSS 3.0HIGH 8.1
  • TI-2023-06763 Cisco DNA Center Privilege Escalation Vulnerability CVSS 3.1HIGH 8.8
  • TI-2021-01030 Cisco DNA Center Privilege Escalation Vulnerability CVSS 3.1HIGH 8.8
  • TI-2026-16396 Cisco Catalyst Center Arbitrary File Read Vulnerability CVSS 3.1HIGH 7.5
See all 25 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences