CVE-2026-76457
Status: ReceivedHigh (8.6)—
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco NX-OS engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-76457 are related to out-of-bounds read issues that are grouped under the Common Weakness Enumeration (CWE) CWE-125.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- Base score: 8.6
Exploitation probability (EPSS)
FIRST hasn't scored this CVE yet (usual for very recent or rejected CVEs).
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (7)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
CWEs
- CWE-125
References
Raw JSON (NVD)
Show
{
"id": "CVE-2026-76457",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Primary",
"source": "psirt@cisco.com",
"cvssData": {
"scope": "CHANGED",
"version": "3.1",
"baseScore": 8.6,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 4,
"exploitabilityScore": 3.9
}
]
},
"affected": [
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{
"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": "6.0(1b)"
},
{
"status": "affected",
"version": "6.0(1c)"
},
{
"status": "affected",
"version": "4.3(6d)"
},
{
"status": "affected",
"version": "6.0(1d)"
},
{
"status": "affected",
"version": "6.0(1e)"
},
{
"status": "affected",
"version": "4.3(6e)"
},
{
"status": "affected",
"version": "6.0(1f)"
},
{
"status": "affected",
"version": "4.3(6f)"
},
{
"status": "affected",
"version": "6.0(2b)"
},
{
"status": "affected",
"version": "6.0(1h)"
},
{
"status": "affected",
"version": "4.2(3r)"
},
{
"status": "affected",
"version": "6.0(2c)"
},
{
"status": "affected",
"version": "4.3(6g)"
},
{
"status": "affected",
"version": "6.0(2d)"
},
{
"status": "affected",
"version": "4.3(6h)"
},
{
"status": "affected",
"version": "4.2(3s)"
},
{
"status": "affected",
"version": "4.3(6i)"
}
],
"defaultStatus": "unknown"
}
]
}
],
"published": "2026-10-07T17:16:58.020",
"references": [
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-nxosw1-cWzSbtR",
"source": "psirt@cisco.com"
}
],
"vulnStatus": "Received",
"weaknesses": [
{
"type": "Primary",
"source": "psirt@cisco.com",
"description": [
{
"lang": "en",
"value": "CWE-125"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco NX-OS engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.\r\n\r\nThe vulnerabilities tracked by CVE-2026-76457 are related to out-of-bounds read issues that are grouped under the Common Weakness Enumeration (CWE) CWE-125."
}
],
"lastModified": "2026-10-07T17:16:58.020",
"sourceIdentifier": "psirt@cisco.com"
}