CVE-2026-76471 (GCVE-0-2026-76471)
Vulnerability from cvelistv5 – Published: 2026-10-07 16:15 – Updated: 2026-10-07 17:46
VLAI
EPSS
VEX
Title
Cisco NX-OS Software NX-API Remote Code Execution Vulnerability
Summary
A vulnerability in the NX-API feature of Cisco NX-OS Software 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.
The vulnerability is due to insufficient input validation of data that is sent to the NX-API. An attacker could exploit this vulnerability by sending a crafted HTTP request to the NX-API of 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 reload of the device 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 17:46 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
1 reference
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Cisco | Cisco NX-OS Software |
Affected:
9.2(3)
Affected: 9.2(2v) Affected: 9.2(1) Affected: 9.2(2t) Affected: 9.2(3y) Affected: 9.3(2) Affected: 9.2(4) Affected: 9.3(1) Affected: 9.3(1z) Affected: 9.2(2) 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 | |
| Cisco | Cisco Unified Computing System (Managed) |
Affected:
4.0(1a)
Affected: 4.1(1d) Affected: 4.0(4f) Affected: 4.0(4a) Affected: 4.0(4e) Affected: 4.0(4c) Affected: 4.0(4h) Affected: 4.1(1c) Affected: 4.0(2a) Affected: 4.1(1e) Affected: 4.1(2a) Affected: 4.0(2b) Affected: 4.0(1b) Affected: 4.0(4d) Affected: 4.0(2e) Affected: 4.1(1a) Affected: 4.0(4g) Affected: 4.0(1c) Affected: 4.0(1d) Affected: 4.0(4b) Affected: 4.0(4i) Affected: 4.0(2d) Affected: 4.1(1b) Affected: 4.1(2b) Affected: 4.0(4k) Affected: 4.1(3a) Affected: 4.1(3b) Affected: 4.1(2c) Affected: 4.0(4l) Affected: 4.1(4a) Affected: 4.1(3c) Affected: 4.1(3d) Affected: 4.2(1c) Affected: 4.2(1d) Affected: 4.0(4m) Affected: 4.1(3e) Affected: 4.2(1f) Affected: 4.1(3f) Affected: 4.2(1i) Affected: 4.1(3h) Affected: 4.2(1k) Affected: 4.2(1l) Affected: 4.0(4n) Affected: 4.2(1m) Affected: 4.1(3i) Affected: 4.2(2a) Affected: 4.2(1n) Affected: 4.1(3j) Affected: 4.2(2c) Affected: 4.2(2d) Affected: 4.2(3b) Affected: 4.1(3k) Affected: 4.0(4o) Affected: 4.2(2e) Affected: 4.2(3d) Affected: 4.2(3e) Affected: 4.2(3g) Affected: 4.1(3l) Affected: 4.3(2b) Affected: 4.2(3h) Affected: 4.2(3i) Affected: 4.3(2c) Affected: 4.1(3m) Affected: 4.3(2e) Affected: 4.3(3a) Affected: 4.2(3j) Affected: 4.3(3c) Affected: 4.3(4a) Affected: 4.2(3k) Affected: 4.3(4b) Affected: 4.3(4c) Affected: 4.2(3l) Affected: 4.3(4d) Affected: 4.3(2f) Affected: 4.2(3m) Affected: 4.3(5a) Affected: 4.3(4e) Affected: 4.1(3n) Affected: 4.3(4f) Affected: 4.2(3n) Affected: 4.3(5c) Affected: 4.2(3o) Affected: 4.3(5d) Affected: 4.3(6a) Affected: 4.3(6b) Affected: 4.3(5e) Affected: 4.3(6c) Affected: 4.2(3p) Affected: 4.3(6d) Affected: 4.3(6e) Affected: 4.3(6f) Affected: 4.2(3r) Affected: 4.3(6g) Affected: 4.3(6h) Affected: 4.2(3s) Affected: 4.3(6i) |
guessed |
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"value": "A vulnerability in the NX-API feature of Cisco NX-OS Software 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.\u0026nbsp;\r\n\r\nThe vulnerability is due to insufficient input validation of data that is sent to the NX-API. An attacker could exploit this vulnerability by sending a crafted HTTP request to the NX-API of 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 reload of the device and a DoS condition."
}
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"value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
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"version": "4.1(1b)"
},
{
"status": "affected",
"version": "4.1(2b)"
},
{
"status": "affected",
"version": "4.0(4k)"
},
{
"status": "affected",
"version": "4.1(3a)"
},
{
"status": "affected",
"version": "4.1(3b)"
},
{
"status": "affected",
"version": "4.1(2c)"
},
{
"status": "affected",
"version": "4.0(4l)"
},
{
"status": "affected",
"version": "4.1(4a)"
},
{
"status": "affected",
"version": "4.1(3c)"
},
{
"status": "affected",
"version": "4.1(3d)"
},
{
"status": "affected",
"version": "4.2(1c)"
},
{
"status": "affected",
"version": "4.2(1d)"
},
{
"status": "affected",
"version": "4.0(4m)"
},
{
"status": "affected",
"version": "4.1(3e)"
},
{
"status": "affected",
"version": "4.2(1f)"
},
{
"status": "affected",
"version": "4.1(3f)"
},
{
"status": "affected",
"version": "4.2(1i)"
},
{
"status": "affected",
"version": "4.1(3h)"
},
{
"status": "affected",
"version": "4.2(1k)"
},
{
"status": "affected",
"version": "4.2(1l)"
},
{
"status": "affected",
"version": "4.0(4n)"
},
{
"status": "affected",
"version": "4.2(1m)"
},
{
"status": "affected",
"version": "4.1(3i)"
},
{
"status": "affected",
"version": "4.2(2a)"
},
{
"status": "affected",
"version": "4.2(1n)"
},
{
"status": "affected",
"version": "4.1(3j)"
},
{
"status": "affected",
"version": "4.2(2c)"
},
{
"status": "affected",
"version": "4.2(2d)"
},
{
"status": "affected",
"version": "4.2(3b)"
},
{
"status": "affected",
"version": "4.1(3k)"
},
{
"status": "affected",
"version": "4.0(4o)"
},
{
"status": "affected",
"version": "4.2(2e)"
},
{
"status": "affected",
"version": "4.2(3d)"
},
{
"status": "affected",
"version": "4.2(3e)"
},
{
"status": "affected",
"version": "4.2(3g)"
},
{
"status": "affected",
"version": "4.1(3l)"
},
{
"status": "affected",
"version": "4.3(2b)"
},
{
"status": "affected",
"version": "4.2(3h)"
},
{
"status": "affected",
"version": "4.2(3i)"
},
{
"status": "affected",
"version": "4.3(2c)"
},
{
"status": "affected",
"version": "4.1(3m)"
},
{
"status": "affected",
"version": "4.3(2e)"
},
{
"status": "affected",
"version": "4.3(3a)"
},
{
"status": "affected",
"version": "4.2(3j)"
},
{
"status": "affected",
"version": "4.3(3c)"
},
{
"status": "affected",
"version": "4.3(4a)"
},
{
"status": "affected",
"version": "4.2(3k)"
},
{
"status": "affected",
"version": "4.3(4b)"
},
{
"status": "affected",
"version": "4.3(4c)"
},
{
"status": "affected",
"version": "4.2(3l)"
},
{
"status": "affected",
"version": "4.3(4d)"
},
{
"status": "affected",
"version": "4.3(2f)"
},
{
"status": "affected",
"version": "4.2(3m)"
},
{
"status": "affected",
"version": "4.3(5a)"
},
{
"status": "affected",
"version": "4.3(4e)"
},
{
"status": "affected",
"version": "4.1(3n)"
},
{
"status": "affected",
"version": "4.3(4f)"
},
{
"status": "affected",
"version": "4.2(3n)"
},
{
"status": "affected",
"version": "4.3(5c)"
},
{
"status": "affected",
"version": "4.2(3o)"
},
{
"status": "affected",
"version": "4.3(5d)"
},
{
"status": "affected",
"version": "4.3(6a)"
},
{
"status": "affected",
"version": "4.3(6b)"
},
{
"status": "affected",
"version": "4.3(5e)"
},
{
"status": "affected",
"version": "4.3(6c)"
},
{
"status": "affected",
"version": "4.2(3p)"
},
{
"status": "affected",
"version": "4.3(6d)"
},
{
"status": "affected",
"version": "4.3(6e)"
},
{
"status": "affected",
"version": "4.3(6f)"
},
{
"status": "affected",
"version": "4.2(3r)"
},
{
"status": "affected",
"version": "4.3(6g)"
},
{
"status": "affected",
"version": "4.3(6h)"
},
{
"status": "affected",
"version": "4.2(3s)"
},
{
"status": "affected",
"version": "4.3(6i)"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the NX-API feature of Cisco NX-OS Software 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.\u0026nbsp;\r\n\r\nThe vulnerability is due to insufficient input validation of data that is sent to the NX-API. An attacker could exploit this vulnerability by sending a crafted HTTP request to the NX-API of 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 reload of the device and a DoS condition."
}
],
"exploits": [
{
"lang": "en",
"value": "The Cisco 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-122",
"description": "Heap-based Buffer Overflow",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-07T16:15:35.076Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-napi-rce-r2shwu2j",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-napi-rce-r2shwu2j"
}
],
"source": {
"advisory": "cisco-sa-napi-rce-r2shwu2j",
"defects": [
"CSCwu46202"
],
"discovery": "INTERNAL"
},
"title": "Cisco NX-OS Software NX-API Remote Code Execution Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2026-76471",
"datePublished": "2026-10-07T16:15:35.076Z",
"dateReserved": "2026-08-19T12:02:03.638Z",
"dateUpdated": "2026-10-07T17:46:15.433Z",
"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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