CVE-2026-76465 (GCVE-0-2026-76465)
Vulnerability from cvelistv5 – Published: 2026-10-07 16:14 – Updated: 2026-10-07 17:44
VLAI
EPSS
VEX
Title
Cisco Nexus 3000 and 9000 Series Switches MPLS OAM Remote Code Execution Vulnerability
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.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 17:44 UTC
CWE
- CWE-590 - Free of Memory not on the Heap
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Cisco | Cisco NX-OS Software |
Affected:
9.3(2)
Affected: 9.3(1) Affected: 9.3(1z) Affected: 9.3(3) Affected: 9.3(4) Affected: 9.3(5) Affected: 9.3(6) Affected: 9.3(5w) Affected: 9.3(7) Affected: 9.3(7k) Affected: 9.3(7a) Affected: 9.3(8) Affected: 9.3(9) Affected: 9.3(10) Affected: 10.3(1) Affected: 10.3(2) Affected: 9.3(11) Affected: 10.3(3) Affected: 9.3(12) Affected: 10.4(1) Affected: 10.3(99w) Affected: 10.3(3w) Affected: 10.3(99x) Affected: 10.3(3o) Affected: 10.3(4) Affected: 10.3(3p) Affected: 10.3(4a) Affected: 10.4(2) Affected: 10.3(3q) Affected: 9.3(13) Affected: 10.3(5) Affected: 10.4(3) Affected: 10.3(3x) Affected: 10.3(4g) Affected: 10.5(1) Affected: 10.3(3r) Affected: 10.3(6) Affected: 9.3(14) Affected: 10.4(4) Affected: 10.3(4h) Affected: 10.5(2) Affected: 10.3(7) Affected: 10.4(5) Affected: 10.5(3) Affected: 9.3(15) Affected: 10.4(4g) Affected: 10.5(4) Affected: 10.6(1) Affected: 10.5(3t) Affected: 10.3(8) Affected: 10.4(6) Affected: 10.5(3s) Affected: 10.5(3e) Affected: 10.5(3o) Affected: 9.3(16) Affected: 10.6(1s) Affected: 10.6(2) Affected: 10.5(3p) Affected: 10.3(9) Affected: 10.6(2s) Affected: 10.6(3) Affected: 10.4(7) Affected: 10.5(5) Affected: 9.3(17) Affected: 10.6(2n) Affected: 10.6(3s) |
guessed |
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"status": "affected",
"version": "10.4(4)"
},
{
"status": "affected",
"version": "10.3(4h)"
},
{
"status": "affected",
"version": "10.5(2)"
},
{
"status": "affected",
"version": "10.3(7)"
},
{
"status": "affected",
"version": "10.4(5)"
},
{
"status": "affected",
"version": "10.5(3)"
},
{
"status": "affected",
"version": "9.3(15)"
},
{
"status": "affected",
"version": "10.4(4g)"
},
{
"status": "affected",
"version": "10.5(4)"
},
{
"status": "affected",
"version": "10.6(1)"
},
{
"status": "affected",
"version": "10.5(3t)"
},
{
"status": "affected",
"version": "10.3(8)"
},
{
"status": "affected",
"version": "10.4(6)"
},
{
"status": "affected",
"version": "10.5(3s)"
},
{
"status": "affected",
"version": "10.5(3e)"
},
{
"status": "affected",
"version": "10.5(3o)"
},
{
"status": "affected",
"version": "9.3(16)"
},
{
"status": "affected",
"version": "10.6(1s)"
},
{
"status": "affected",
"version": "10.6(2)"
},
{
"status": "affected",
"version": "10.5(3p)"
},
{
"status": "affected",
"version": "10.3(9)"
},
{
"status": "affected",
"version": "10.6(2s)"
},
{
"status": "affected",
"version": "10.6(3)"
},
{
"status": "affected",
"version": "10.4(7)"
},
{
"status": "affected",
"version": "10.5(5)"
},
{
"status": "affected",
"version": "9.3(17)"
},
{
"status": "affected",
"version": "10.6(2n)"
},
{
"status": "affected",
"version": "10.6(3s)"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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\u0026nbsp;root privileges or cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis 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\u0026nbsp;root privileges and could cause process crashes, which could result in a device reload and a DoS condition."
}
],
"exploits": [
{
"lang": "en",
"value": "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."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-590",
"description": "Free of Memory not on the Heap",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-07T16:14:26.107Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-moam-rce-uBTzYV7",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-moam-rce-uBTzYV7"
}
],
"source": {
"advisory": "cisco-sa-moam-rce-uBTzYV7",
"defects": [
"CSCwu19799"
],
"discovery": "INTERNAL"
},
"title": "Cisco Nexus 3000 and 9000 Series Switches MPLS OAM Remote Code Execution Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-76465",
"datePublished": "2026-10-07T16:14:26.107Z",
"dateReserved": "2026-08-19T12:02:03.637Z",
"dateUpdated": "2026-10-07T17:44:53.620Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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