Cisco Security Advisories October 2026

THREAT INTELLIGENCE

Peer Review

4.8

Proven Trust

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Critical

CVE-2026-76482

Cisco

October 7, 2026

Executive Summary

Multiple critical flaws, including unauthenticated NX-OS remote code execution (CVSS 9.8) and a CVSS 10 License On-Prem flaw, CVE-2026-76482.

Key Details

Affected Platform

Cisco

Attack Surface

Recommended Action

Apply vendor patch

Affected Environment

Cisco NX-OS devices (Nexus, MDS, UCS), Meraki, License On-Prem, APIC, and Finesse contact center products.

Operational Impact

Root code execution, device reloads, unauthorised licensing access, and loss of data centre network control.

Technical Root Cause

Insufficient input validation, memory handling, access control, and authentication flaws across NX-OS, Meraki, License On-Prem, and APIC.

Recommended Mitigation

Upgrade to the Cisco fixed releases listed per product; no workarounds exist, and some fixes arrive after October.

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Full Technical Report

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References

Cisco Security Advisories.