CVE-2026-83578
CriticalCVSS 9.8Summary
Integer underflow vulnerability in Windows PowerShell allows an unauthorized attacker to execute code over a network.
Risk Assessment
An attacker can remotely execute code on the system, potentially leading to full system compromise or data theft.
Recommendation
Install the latest security updates for Windows PowerShell and restrict network access to PowerShell services.
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-2026-69807High
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-2026-40400High
Relative path traversal vulnerability in Windows PowerShell allows an authorized attacker to execute code remotely.
- 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)
Integer underflow (wrap or wraparound) in Windows PowerShell allows an unauthorized attacker to execute code over a network.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS