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CVE-2026-76465: Cisco NX-OS Software

Severity

9.8 (CRITICAL)

Vendor

CISCO

Affected versions

9.3(2); 9.3(1); 9.3(1z)

Patch status

Unknown

Published

2026-10-07T17:16:59.350

Modified

2026-10-07T18:17:28.580

Why it matters

This matters because the affected product may be exploitable without valid credentials. Internet-facing deployments should be reviewed first.

Recommended admin actions

• Prioritize validation immediately due to critical CVSS severity.
• Treat internet-facing systems as higher priority.

Technical summary

A vulnerability in the MPLS Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software for Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper validation when an affected device is processing an MPLS echo-request packet. An attacker could exploit this vulnerability by sending a crafted MPLS echo-request to an IP address on an affected device. A successful exploit could allow the attacker to execute arbitrary code with root privileges and could cause process crashes, which could result in a device reload and a DoS condition.

View the official NVD record for CVE-2026-76465

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.