CVE-2026-76455 Cisco NX-OS - Broken Access Control

Cisco NX-OS contains improper access control vulnerabilities caused by insufficient authorization checks, letting attackers gain unauthorized access, exploit requires network access.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.28% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Broken Access Control
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
7 October 2026
Updated
15 October 2026
Weakness
CWE-284

Vendor fix

Update to the latest Cisco NX-OS software version with security hardening fixes.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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