CVE-2026-26170: CWE-20: Improper Input Validation in Microsoft Windows 10 Version 1607
Improper input validation in Microsoft PowerShell allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-26170) is caused by improper input validation in Microsoft PowerShell on Windows 10 Version 1607 (build 10.0.14393.0). It enables an authorized local attacker to elevate privileges, potentially gaining higher system rights. The CVSS 3.1 base score is 7.8, indicating high severity, with attack vector local, low attack complexity, and no user interaction required. Microsoft has published an official fix for this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, resulting in full confidentiality, integrity, and availability impact on the affected system. This could lead to unauthorized system control or modification of sensitive data.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26170 to remediate this vulnerability.
CVE-2026-26170: CWE-20: Improper Input Validation in Microsoft Windows 10 Version 1607
Description
Improper input validation in Microsoft PowerShell allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-26170) is caused by improper input validation in Microsoft PowerShell on Windows 10 Version 1607 (build 10.0.14393.0). It enables an authorized local attacker to elevate privileges, potentially gaining higher system rights. The CVSS 3.1 base score is 7.8, indicating high severity, with attack vector local, low attack complexity, and no user interaction required. Microsoft has published an official fix for this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, resulting in full confidentiality, integrity, and availability impact on the affected system. This could lead to unauthorized system control or modification of sensitive data.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26170 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-02-11T18:33:57.776Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26170","vendor":"Microsoft"}]
Threat ID: 69de7a1882d89c981fd6a68c
Added to database: 04/14/2026, 17:32:08 UTC
Last enriched: 06/19/2026, 16:59:46 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 100
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