CVE-2026-20817: CWE-280: Improper Handling of Insufficient Permissions or Privileges in Microsoft Windows 10 Version 21H2
Improper handling of insufficient permissions or privileges in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20817) affects Windows 10 Version 21H2 (build 10.0.19044.0) and stems from improper handling of insufficient permissions or privileges in the Windows Error Reporting component. An authorized local attacker can exploit this flaw to elevate privileges, potentially gaining higher-level access than intended. The CVSS 3.1 vector indicates local attack vector, low attack complexity, low privileges required, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability. The vendor has released a patch to remediate this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, which can lead to full system compromise including unauthorized access to sensitive data and disruption of system operations. The high CVSS score reflects the critical nature of the impact on confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
A patch is available to remediate this vulnerability. It is recommended to apply the official Microsoft update for Windows 10 Version 21H2 (build 10.0.19044.0) as soon as possible to mitigate the risk. No additional mitigations are specified or required beyond applying the patch.
CVE-2026-20817: CWE-280: Improper Handling of Insufficient Permissions or Privileges in Microsoft Windows 10 Version 21H2
Description
Improper handling of insufficient permissions or privileges in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20817) affects Windows 10 Version 21H2 (build 10.0.19044.0) and stems from improper handling of insufficient permissions or privileges in the Windows Error Reporting component. An authorized local attacker can exploit this flaw to elevate privileges, potentially gaining higher-level access than intended. The CVSS 3.1 vector indicates local attack vector, low attack complexity, low privileges required, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability. The vendor has released a patch to remediate this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, which can lead to full system compromise including unauthorized access to sensitive data and disruption of system operations. The high CVSS score reflects the critical nature of the impact on confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
A patch is available to remediate this vulnerability. It is recommended to apply the official Microsoft update for Windows 10 Version 21H2 (build 10.0.19044.0) as soon as possible to mitigate the risk. No additional mitigations are specified or required beyond applying the patch.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.373Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668adba60475309f9adf91
Added to database: 1/13/2026, 6:11:39 PM
Last enriched: 4/3/2026, 12:41:49 PM
Last updated: 5/10/2026, 10:03:48 AM
Views: 181
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