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CVE-2026-124226ImportantSFBLocal

Microsoft PowerShell Security Feature Bypass Vulnerability

MSRC advisory NVD CVE.org

Assessment

Execution with unnecessary privileges in Windows PowerShell allows an authorized attacker to bypass a security feature locally.

Severity
Important
CVSS base score
8.8
Impact
Security Feature Bypass
Exploitation detected
No known exploitation (MSRC assessment)
Exploitability
Exploitation Less Likely
Publicly disclosed
No (MSRC assessment)
EPSS · 30-day forecast
No EPSS score collected
Customer action
Required: follow the MSRC remediation guidance
More details
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C
Public detection template
No Nuclei template is listed in the current collected catalog
Component
Windows PowerShell
Weakness
CWE-250: Execution with Unnecessary Privileges
Issued by
Microsoft
Published
10 Nov 2026 · November 2026
Last revised
10 Nov 2026
CVSS 3.1 base metricsRed raises the risk · green lowers it
Attack vector
LocalAV:L
Attack complexity
LowAC:L
Privileges required
LowPR:L
User interaction
NoneUI:N
Scope
ChangedS:C
Confidentiality
HighC:H
Integrity
HighI:H
Availability
HighA:H

Updates that fix it

8 KBs
KBTypeRestartApplies toOther CVEs
KB5131085 Security UpdateRequiredWindows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019 and 1 moreAll CVEs in KB5131085
KB5131087 Security UpdateRequiredWindows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based SystemsAll CVEs in KB5131087
KB5131090 Security UpdateRequiredWindows Server 2022, Windows Server 2022 (Server Core installation)All CVEs in KB5131090
KB5131096 Security UpdateRequiredWindows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems and 3 moreAll CVEs in KB5131096
KB5131291 Security UpdateRequiredWindows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems, Windows Server 2016 and 1 moreAll CVEs in KB5131291
KB5132059 Security UpdateRequiredWindows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based SystemsAll CVEs in KB5132059
KB5135385 Security Update—Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems and 3 moreAll CVEs in KB5135385
KB5135386 Security Update—Windows Server 2025, Windows Server 2025 (Server Core installation)All CVEs in KB5135386

Affected products

ESU, Windows
28 affected products
Page history

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