{"id":"CVE-2026-40400","revision":"b4a8d80e611345b9a1e162a7bc56d93f","records":[{"revision":"b4a8d80e611345b9a1e162a7bc56d93f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-40400","aliases":[],"title":"Windows PowerShell Remote Code Execution Vulnerability","description":"Relative path traversal in Windows PowerShell allows an authorized attacker to execute code over a network.","state":0,"publishedAt":"2026-07-14T17:05:42.396+00:00","modifiedAt":"2026-10-08T18:13:56.604+00:00","affected":[{"ecosystem":"Vendor product","name":"PowerShell 7.5","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"PowerShell 7.5\",\n                    \"versions\": [\n                        {\n                            \"version\": \"7.5.0\",\n                            \"lessThan\": \"7.5.11\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"PowerShell 7.6","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"PowerShell 7.6\",\n                    \"versions\": [\n                        {\n                            \"version\": \"7.6.0\",\n                            \"lessThan\": \"7.6.6\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows 10 Version 1607","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows 10 Version 1607\",\n                    \"platforms\": [\n                        \"32-bit Systems\",\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"10.0.14393.0\",\n                            \"lessThan\": \"10.0.14393.9339\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows 10 Version 1809","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows 10 Version 1809\",\n                    \"platforms\": [\n                        \"32-bit Systems\",\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"10.0.17763.0\",\n                            \"lessThan\": \"10.0.17763.9020\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows 10 Version 21H2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows 10 Version 21H2\",\n                    \"platforms\": [\n                        \"32-bit Systems\",\n                        \"ARM64-based Systems\",\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"10.0.19044.0\",\n                            \"lessThan\": \"10.0.19044.7548\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows 10 Version 22H2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows 10 Version 22H2\",\n                    \"platforms\": [\n                        \"32-bit Systems\",\n                        \"ARM64-based Systems\",\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"10.0.19045.0\",\n                            \"lessThan\": \"10.0.19045.7548\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows 11 Version 24H2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows 11 Version 24H2\",\n                    \"platforms\": [\n                        \"ARM64-based Systems\",\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"10.0.26100.0\",\n                            \"lessThan\": \"10.0.26100.8875\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows 11 Version 25H2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows 11 Version 25H2\",\n                    \"platforms\": [\n                        \"ARM64-based Systems\",\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"10.0.26200.0\",\n                            \"lessThan\": \"10.0.26200.8875\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows 11 version 26H1","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows 11 version 26H1\",\n                    \"platforms\": [\n                        \"ARM64-based Systems\",\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"10.0.28000.0\",\n                            \"lessThan\": \"10.0.28000.2525\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows Server 2012","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows Server 2012\",\n                    \"platforms\": [\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.2.9200.0\",\n                            \"lessThan\": \"6.2.9200.26226\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows Server 2012 (Server Core installation)","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows Server 2012 (Server Core installation)\",\n                    \"platforms\": [\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.2.9200.0\",\n                            \"lessThan\": \"6.2.9200.26226\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows Server 2012 R2","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows Server 2012 R2\",\n                    \"platforms\": [\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.3.9600.0\",\n                            \"lessThan\": \"6.3.9600.23291\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows Server 2012 R2 (Server Core installation)","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows Server 2012 R2 (Server Core installation)\",\n                    \"platforms\": [\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.3.9600.0\",\n                            \"lessThan\": \"6.3.9600.23291\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows Server 2016","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows Server 2016\",\n                    \"platforms\": [\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"10.0.14393.0\",\n                            \"lessThan\": \"10.0.14393.9339\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows Server 2016 (Server Core installation)","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows Server 2016 (Server Core installation)\",\n                    \"platforms\": [\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"10.0.14393.0\",\n                            \"lessThan\": \"10.0.14393.9339\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows Server 2019","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows Server 2019\",\n                    \"platforms\": [\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"10.0.17763.0\",\n                            \"lessThan\": \"10.0.17763.9020\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows Server 2019 (Server Core installation)","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows Server 2019 (Server Core installation)\",\n                    \"platforms\": [\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"10.0.17763.0\",\n                            \"lessThan\": \"10.0.17763.9020\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows Server 2022","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows Server 2022\",\n                    \"platforms\": [\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"10.0.20348.0\",\n                            \"lessThan\": \"10.0.20348.5386\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows Server 2025","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows Server 2025\",\n                    \"platforms\": [\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"10.0.26100.0\",\n                            \"lessThan\": \"10.0.26100.33158\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Windows Server 2025 (Server Core installation)","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Microsoft\",\n                    \"product\": \"Windows Server 2025 (Server Core installation)\",\n                    \"platforms\": [\n                        \"x64-based Systems\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"10.0.26100.0\",\n                            \"lessThan\": \"10.0.26100.33158\",\n                            \"versionType\": \"custom\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","score":8,"severity":"HIGH"}],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40400"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-40400","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-40400","identifiers":["CVE-2026-40400"]},"retained":false,"historicalAffected":[]}],"coverage":[]}