Summary
Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
How could an attacker exploit this vulnerability?
An attacker could host a malicious server and convince a user to connect to it from an affected client. When the client processes the server's response, the attacker could execute code on the client system. User interaction is required.
Vulnerabilities 1
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High 8.8
Microsoft PowerShell Remote Code Execution Vulnerability
Relative path traversal in Microsoft PowerShell Core allows an unauthorized attacker to execute code over a network.
Revision history
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#6
Updated an acknowledgement. This is an informational change only.
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#5
Acknowledgement Updated
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#4
Acknowledgement Updated
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#3
Acknowledgement Updated
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#2
The security updates for Powershell have been updated.
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#1
Information published.
References
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CVE-2026-70337 Microsoft PowerShell Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70337
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss