Access Control Vulnerabilities in Cisco's NX-OS
CVE-2026-76455

9.8CRITICAL

Key Information:

Vendor

Cisco
Status
Cisco Nx-os Software
Cisco Nx-os System Software In Aci Mode
Cisco Unified Computing System (managed)
Vendor
CVE Published:
7 October 2026

Badges

👾 Exploit Exists

What is CVE-2026-76455?

Cisco's NX-OS has been identified with multiple access control vulnerabilities as a result of thorough internal reviews aimed at enhancing security. These vulnerabilities fall under the Common Weakness Enumeration category CWE-284, which highlights issues related to inadequate control mechanisms. Proper implementation of access control is crucial in maintaining the integrity and security of network devices. Users of affected NX-OS versions are advised to apply the latest software hardening updates to mitigate these risks and enhance their security posture.

Affected Version(s)

Cisco NX-OS Software 8.2(5)

Cisco NX-OS Software 7.3(5)D1(1)

Cisco NX-OS Software 8.4(2)

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.