CVE-2026-76465 Cisco Nexus 3000 and 9000 Series Switches MPLS OAM Remote Code Execution Vulnerability
Unauthenticated remote attackers can execute arbitrary code with root privileges or cause denial of service on Cisco Nexus switches via crafted MPLS packets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76465?
CVE-2026-76465 is a critical memory corruption vulnerability in Cisco NX-OS Software, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-590
Which versions are affected by CVE-2026-76465?
How do I fix CVE-2026-76465?
No fix has been published for CVE-2026-76465 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-76465 being exploited?
There is no known exploitation of CVE-2026-76465 in the wild and no public exploit code.
Sources
Also known as GHSA-74h7-6gf3-j457.