CVE-2026-76456: Cisco NX-OS Software Security Hardening Release: October 2026 - Improper Input Validation Vulnerabilities
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco NX-OS engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-76456 are related to improper input validation of special elements used in a command issue that are grouped under the Common Weakness Enumeration (CWE) CWE-20.
Affected Software
Event History
Frequently Asked Questions
What does an attacker need to exploit this issue?
The CVSS vector indicates that exploitation is network-accessible, requires low attack complexity, and does not require privileges or user interaction.
What is the expected security impact?
The reported impact is high on availability, with no confidentiality or integrity impact indicated. The CVSS vector also indicates a changed scope.
How can I determine whether a particular NX-OS deployment is affected?
The provided information identifies Cisco NX-OS Software but does not list affected versions, fixed releases, or configuration conditions. Review the referenced Cisco security advisory for product-specific applicability and remediation details.