CVE-2026-76465 Cisco NX-OS - Remote Code Execution & Denial of Service

Cisco NX-OS Software for Cisco Nexus 3000 and 9000 Series Switches contains a remote code execution and denial of service vulnerability caused by improper validation of MPLS echo-request packets, letting unauthenticated remote attackers execute code with root privileges or cause device reload, exploit requires sending crafted MPLS echo-request packets.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.45% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Remote Code Execution
Impact
Remote Code Execution, Denial Of Service
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-590

Vendor fix

Update to the latest Cisco NX-OS Software version that addresses this vulnerability.

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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