CVE-2026-40400
HighCVSS 8.0Exploitation Probability (EPSS)
Elevated risk57th percentile - higher than 57% of all known CVEs
Summary
Relative path traversal vulnerability in Windows PowerShell allows an authorized attacker to execute code remotely.
Risk Assessment
An attacker with system access can bypass path restrictions and execute arbitrary code, leading to privilege escalation.
Recommendation
Install the latest security patch for Windows PowerShell from Microsoft.
Other vulnerabilities in Windows PowerShell
See all- CVE-2017-8565High
PowerShell in Windows has a vulnerability allowing remote code execution when PSObject wraps a CIM Instance. This affects multiple versions of Windows, including Windows Server 2008 and Windows 10.
- CVE-2026-83578Critical
Integer underflow vulnerability in Windows PowerShell allows an unauthorized attacker to execute code over a network.
- CVE-2026-85817High
Reliance on untrusted inputs in a security decision in Windows PowerShell allows an unauthorized attacker to execute code over a network.
- CVE-2026-85805Medium
Improperly implemented security check for standard in Windows PowerShell allows an unauthorized attacker to bypass a security feature over a network.
- CVE-2026-70185High
A protection mechanism failure in Windows PowerShell allows an authorized attacker to bypass a security feature locally.
- CVE-2026-70052High
An integer overflow or wraparound vulnerability exists in Windows PowerShell. An authorized attacker can exploit this flaw to execute code locally.
- CVE-2026-69807High
Improper limitation of a pathname to a restricted directory ('path traversal') in Windows PowerShell allows an authorized attacker to elevate privileges over a network.
- CVE-2026-62801Medium
Improper limitation of a pathname to a restricted directory ('path traversal') in Windows PowerShell allows an unauthorized attacker to bypass a security feature over a network.
- CVE-2025-54100High
Improper neutralization of special elements used in a command ('command injection') in Windows PowerShell allows an unauthorized attacker to execute code locally.
Original NVD description (English source)
Relative path traversal in Windows PowerShell allows an authorized attacker to execute code over a network.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS