CVE-2026-70338
highpriority · track · 31EPSS 0.004 · 29 %ileDEEUNLUSEPSS · scored 2026-10-27
Improper control of generation of code ('code injection') in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (141)
Products and version ranges known to be affected.
- Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607all versionscert_bundDEcpe:/a:microsoft:.net_framework:3.5_and_4.6.24.74.7.14.7.2_on_windows_10_version_1607
- Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809all versionscert_bundDEcpe:/a:microsoft:.net_framework:3.5_and_4.7.2_on_windows_10_version_1809
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809all versionscert_bundDEcpe:/a:microsoft:.net_framework:3.5_and_4.8_on_windows_10_version_1809
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 21H2all versionscert_bundDEcpe:/a:microsoft:.net_framework:3.5_and_4.8_on_windows_10_version_21h2
- Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 22H2all versionscert_bundDEcpe:/a:microsoft:.net_framework:3.5_and_4.8_on_windows_10_version_22h2
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 21H2all versionscert_bundDEcpe:/a:microsoft:.net_framework:3.5_and_4.8.1_on_windows_10_version_21h2
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 10 Version 22H2all versionscert_bundDEcpe:/a:microsoft:.net_framework:3.5_and_4.8.1_on_windows_10_version_22h2
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 23H2all versionscert_bundDEcpe:/a:microsoft:.net_framework:3.5_and_4.8.1_on_windows_11_version_23h2
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 24H2all versionscert_bundDEcpe:/a:microsoft:.net_framework:3.5_and_4.8.1_on_windows_11_version_24h2
- Microsoft .NET Framework 3.5 AND 4.8.1 on Windows 11 Version 25H2all versionscert_bundDEcpe:/a:microsoft:.net_framework:3.5_and_4.8.1_on_windows_11_version_25h2
- Microsoft .NET Framework 3.5 on Windows 11 version 26H1all versionscert_bundDEcpe:/a:microsoft:.net_framework:3.5_on_windows_11_version_26h1
- Microsoft .NET Framework 4.8 on Windows 10 Version 1607all versionscert_bundDEcpe:/a:microsoft:.net_framework:4.8_on_windows_10_version_1607
- Microsoft .NET Framework 4.8.1 on Windows 11 version 26H1all versionscert_bundDEcpe:/a:microsoft:.net_framework:4.8.1_on_windows_11_version_26h1
- Microsoft Visual Studio Code CoPilot Chat Extensionall versionscert_bundDEcpe:/a:microsoft:visual_studio_code:copilot_chat_extension
advisories (4)
Vendor and ecosystem advisories describing this.
- NCSC-2026-0285Kwetsbaarheden verholpen in Microsoft Developer ToolsNL2026-08-11csaf · ncsc_nlNL
Microsoft heeft kwetsbaarheden verholpen in diverse Developer Tools.
- WID-SEC-W-2026-2761Microsoft Developer Tools: Mehrere SchwachstellenDeutsch2026-08-11csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Microsoft Visual Studio Code, Microsoft Windows Server 2012, Microsoft Windows Server 2012 R2, Microsoft Windows Server 2016, Microsoft .NET Framework, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Microsoft Windows Server 2025, Microsoft PowerShell, Microsoft Windows, Microsoft .NET, Microsoft Visual Studio 2022 und Microsoft Visual Studio 2026 ausnutzen, um beliebigen Programmcode auszuführen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, und um Sicherheitsvorkehrungen zu umgehen.
- msrc_CVE-2026-70338Microsoft PowerShell Security Feature Bypass Vulnerability2026-08-11csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
- BIT-powershell-2026-70338Microsoft PowerShell Security Feature Bypass Vulnerability2026-08-17vendor · osvUS
Improper control of generation of code ('code injection') in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (3)
External citations — patches, advisories, analysis.
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