CVE-2026-83578
Status: Awaiting AnalysisCritical (9.8)—
Integer underflow (wrap or wraparound) in Windows PowerShell allows an unauthorized attacker to execute code over a network.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Base score: 9.8
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
T1190Exploit Public-Facing Applicationinitial access90 % - Primary impact
T1059.001PowerShellexecution85 %
Vector AV:N/PR:N/UI:N permite explotación remota sin autenticación; la descripción nombra Windows PowerShell y ejecución de código por red, por lo que el impacto es T1059.001.
Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.
🛡️ 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-122, CWE-190, CWE-191
References
Raw JSON (NVD)
Show
{
"id": "CVE-2026-83578",
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"timestamp": "2026-10-08T00:00:00+00:00"
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{
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],
"published": "2026-10-13T19:20:00.457",
"references": [
{
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83578",
"source": "secure@microsoft.com"
}
],
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"type": "Secondary",
"source": "secure@microsoft.com",
"description": [
{
"lang": "en",
"value": "CWE-122"
},
{
"lang": "en",
"value": "CWE-190"
},
{
"lang": "en",
"value": "CWE-191"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Integer underflow (wrap or wraparound) in Windows PowerShell allows an unauthorized attacker to execute code over a network."
}
],
"lastModified": "2026-10-14T04:18:38.437",
"sourceIdentifier": "secure@microsoft.com"
}