Cisco Nexus 3000 and 9000 Series Switches MPLS OAM Remote Code Execution Vulnerability
Summary
| CVE | CVE-2026-76465 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-07 17:16:59 UTC |
| Updated | 2026-10-08 20:08:45 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 9.8 CRITICAL from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.004480000 probability, percentile 0.370130000 (date 2026-10-09)
Problem Types: CWE-590 | CWE-590 Free of Memory not on the Heap
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | CVSSV3_1 | 9.8 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(2) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(1) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(1z) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(3) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(4) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(5) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(6) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(5w) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(7) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(7k) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(7a) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(8) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(9) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(10) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(1) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(2) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(11) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(3) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(12) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.4(1) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(99w) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(3w) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(99x) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(3o) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(4) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(3p) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(4a) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.4(2) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(3q) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(13) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(5) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.4(3) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(3x) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(4g) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.5(1) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(3r) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(6) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(14) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.4(4) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(4h) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.5(2) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(7) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.4(5) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.5(3) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(15) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.4(4g) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.5(4) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.6(1) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.5(3t) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(8) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.4(6) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.5(3s) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.5(3e) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.5(3o) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(16) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.6(1s) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.6(2) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.5(3p) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.3(9) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.6(2s) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.6(3) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.4(7) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.5(5) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 9.3(17) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.6(2n) | Not specified |
| CNA | Cisco | Cisco NX-OS Software | affected 10.6(3s) | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-moam-r... | [email protected] | sec.cloudapps.cisco.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Exploits
CNA: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
There are currently no legacy QID mappings associated with this CVE.