CVE-2026-83578 Microsoft PowerShell Remote Code Execution Vulnerability

{
  "id": "94961934a5f9870e819026f6d0f3d1248e2a8a07b72bd4d7119d6543a7d11fd8",
  "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83578",
  "method": "llm",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-83578 Microsoft PowerShell Remote Code Execution Vulnerability",
    "summary": "An integer underflow in Windows PowerShell may allow an unauthorized attacker to execute code over a network.",
    "evidence": "Integer underflow (wrap or wraparound) in Windows PowerShell allows an unauthorized attacker to execute code over a network.",
    "products": [
      {
        "name": {
          "value": "Windows PowerShell",
          "evidence": "Integer underflow (wrap or wraparound) in Windows PowerShell allows an unauthorized attacker to execute code over a network."
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-83578",
        "evidence": "CVE-2026-83578 Microsoft PowerShell Remote Code Execution Vulnerability"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-microsoft-security-updates",
  "document_id": 24930,
  "published_at": "2026-10-13T14:00:00+00:00"
}