PowerShell: Security feature bypass via code injection
Summary
Windows PowerShell in supported Windows 10, Windows 11 and Windows Server versions contains a code injection flaw (CWE-94) that allows an authorized user to bypass a PowerShell security feature. The attacker needs a local account with low privileges, and the attack complexity is high. Impact is limited to integrity (CVSS 4.7, Medium). Microsoft fixed the issue in the November 2026 Patch Tuesday updates.
Affected
- Windows 10 Version 1607 (10.0.14393.0 to < 10.0.14393.9688)
- Windows 10 Version 1809 (10.0.17763.0 to < 10.0.17763.9487)
- Windows 10 Version 21H2 (10.0.19044.0 to < 10.0.19044.7846)
- Windows 10 Version 22H2 (10.0.19045.0 to < 10.0.19045.7846)
- Windows 11 Version 23H2 (10.0.22631.0 to < 10.0.22631.7711)
- Windows 11 Version 24H2 (10.0.26100.0 to < 10.0.26100.9974)
- Windows 11 Version 25H2 (10.0.26200.0 to < 10.0.26200.9974)
- Windows 11 Version 26H1 (10.0.28000.0 to < 10.0.28000.3501)
- Windows 11 Version 26H2 (10.0.26300.0 to < 10.0.26300.9974)
- Windows Server 2016, including Server Core (10.0.14393.0 to < 10.0.14393.9688)
- Windows Server 2019, including Server Core (10.0.17763.0 to < 10.0.17763.9487)
- Windows Server 2022 (10.0.20348.0 to < 10.0.20348.5870)
Fixed in
- Security update of 10 November 2026 (Patch Tuesday) for the affected Windows versions.
- Build numbers are taken from the CVE record; verify the Windows 10 21H2 build against the MSRC Security Update Guide, as sources differ.
Workaround
- Unknown. No vendor workaround has been confirmed.
- Restricting PowerShell use for local users may serve as a compensating measure, but this is not confirmed by Microsoft for this CVE.
Exploitation
- No known exploitation in the wild.
- CISA SSVC: Exploitation none, Automatable no.
- Rapid7 rates exploitation as less likely.
- No public proof of concept found.
Our recommendation
- Install the November 2026 Windows security updates on all affected systems, starting with servers and multi-user systems such as terminal and file servers.
- Check the extended support status of Windows 10 1809 and Server 2019.
- Confirm the installed build against the MSRC Security Update Guide.
- Include in the regular monthly patch cycle; no emergency action required.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Security feature bypass – Windows PowerShell
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5131291, KB5131085, KB5131096, KB5131090, KB5131087, KB5132061
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide: CVE-2026-113815 msrc.microsoft.com
- CVE Record CVE-2026-113815 www.cve.org
- Rapid7 Patch Tuesday November 2026 www.rapid7.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 11 Nov 2026, 20:53.
Original description (NVD)
Improper control of generation of code ('code injection') in Windows PowerShell allows an authorized attacker to bypass a security feature locally.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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