CVE-2026-83728
Status: Awaiting AnalysisHigh (8.8)—
Improper validation of syntactic correctness of input in Windows Hyper-V allows an authorized attacker to perform spoofing locally.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Base score: 8.8
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).
🎯 ATT&CK techniques
How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.
- Exploitation
T1068Exploitation for Privilege Escalationprivilege escalation60 %
Inferred by deterministic rules from the CVSS vector and CWE. Indicative only.
🛡️ ATT&CK mitigations that cover these techniques
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
CWEs
- CWE-1286
References
Raw JSON (NVD)
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{
"id": "CVE-2026-83728",
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"timestamp": "2026-10-13T22:15:18.838477Z"
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"vendor": "Microsoft",
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"product": "Windows Server 2022",
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"vendor": "Microsoft",
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"published": "2026-10-13T19:20:18.330",
"references": [
{
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83728",
"source": "secure@microsoft.com"
}
],
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"type": "Secondary",
"source": "secure@microsoft.com",
"description": [
{
"lang": "en",
"value": "CWE-1286"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Improper validation of syntactic correctness of input in Windows Hyper-V allows an authorized attacker to perform spoofing locally."
}
],
"lastModified": "2026-10-13T23:18:23.617",
"sourceIdentifier": "secure@microsoft.com"
}