Microsoft PowerShell Spoofing Vulnerability
Priority LOW 30Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
Microsoft PowerShell Spoofing Vulnerability
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.02452 84th percentileScored 2026-11-07
Fix Fixed CBL Mariner 1.0 x64 (Microsoft): 7.2.1-1CBL Mariner 1.0 ARM (Microsoft): 7.2.1-1+1 more product
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | CBL Mariner 2.0 x64 | N/A | — | No fix listed | CNA |
| Microsoft | CBL Mariner 2.0 ARM | N/A | — | No fix listed | CNA |
| Microsoft | CBL Mariner 1.0 x64 | 1.0 to before 7.2.1-1 | 7.2.1-1 | Patch available | CNA |
| Microsoft | CBL Mariner 1.0 ARM | 1.0 to before 7.2.1-1 | 7.2.1-1 | Patch available | CNA |
| Microsoft | PowerShell 7.2 | 7.2.0 to before 7.2.1 | 7.2.1 | Patch available | CNA |
- CBL Mariner 2.0 x64 VendorMicrosoft Affected N/A Fixed in — No fix listed CNA
- CBL Mariner 2.0 ARM VendorMicrosoft Affected N/A Fixed in — No fix listed CNA
- CBL Mariner 1.0 x64 VendorMicrosoft Affected 1.0 to before 7.2.1-1 Fixed in 7.2.1-1 Patch available CNA
- CBL Mariner 1.0 ARM VendorMicrosoft Affected 1.0 to before 7.2.1-1 Fixed in 7.2.1-1 Patch available CNA
- PowerShell 7.2 VendorMicrosoft Affected 7.2.0 to before 7.2.1 Fixed in 7.2.1 Patch available CNA
Remediation
- Fix · CNA CBL Mariner 1.0 x64 (Microsoft) Fixed in 7.2.1-1
- Fix · CNA CBL Mariner 1.0 ARM (Microsoft) Fixed in 7.2.1-1
- Fix · CNA PowerShell 7.2 (Microsoft) Fixed in 7.2.1
Timeline
- 2026-10-02 Threatist record created from CVE-2021-43896
- 2026-10-03 Alias added: GHSA-2w8h-77mr-j4fw
More Microsoft Powershell vulnerabilities
- TI-2024-14152 .NET and Visual Studio Denial of Service Vulnerability CVSS 3.1HIGH 7.5
- TI-2022-19606 PowerShell Remote Code Execution Vulnerability CVSS 3.1HIGH 8.5
- TI-2018-06024 A remote code execution vulnerability exists in PowerShell Editor Services, aka… CVSS 3.1CRITICAL 9.8
- TI-2024-00056 NET, .NET Framework, and Visual Studio Security Feature Bypass Vulnerability CVSS 3.1CRITICAL 9.8
- TI-2022-07392 .NET and Visual Studio Denial of Service Vulnerability CVSS 3.1HIGH 7.5
- TI-2024-17279 Microsoft QUIC Denial of Service Vulnerability CVSS 3.1HIGH 7.5
Sources
- CVE-2021-43896 · CVE Program
- CVE-2021-43896 · NVD
- FIRST EPSS
- GHSA-2w8h-77mr-j4fw · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences