CVE-2026-96303

Analyzed Analyzed - Analysis Complete

Security Feature Bypass in Microsoft PowerShell

Publication date: 2026-10-13

Last updated on: 2026-10-22

Assigner: Microsoft Corporation

Description

Improperly implemented security check for standard in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature over a network.

CVSS Scores

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Meta Information

Published

2026-10-13

Last Modified

2026-10-22

Generated

2026-11-08

AI Q&A

2026-10-14

EPSS Evaluated

2026-11-07

NVD

CVE-2026-96303

EUVD

EUVD-2026-100222

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	powershell	From 7.4 (inc) to 7.4.21 (exc)
microsoft	powershell	From 7.5 (inc) to 7.5.12 (exc)
microsoft	powershell	From 7.6 (inc) to 7.6.7 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-358	The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique.

Attack-Flow Graph

Executive Summary

This vulnerability involves an improperly implemented security check in Microsoft PowerShell. An unauthorized attacker can bypass a security feature by exploiting this flaw over a network.

Impact Analysis

An attacker could bypass security controls in PowerShell, potentially leading to unauthorized actions or access. This may allow them to execute malicious commands or manipulate system behavior without proper authentication.

Compliance Impact

This vulnerability allows unauthorized attackers to bypass security features in Microsoft PowerShell, which could lead to unauthorized access or data exfiltration. This may violate compliance requirements under GDPR (data protection) and HIPAA (health data security) by enabling unauthorized data access or processing.

Mitigation Strategies

Apply the latest security updates from Microsoft for PowerShell versions 7.4, 7.5, and 7.6 to address the improper security check implementation.

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