CVE-2026-20844: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Use after free in Windows Clipboard Server allows an unauthorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20844) involves a use-after-free condition in the Windows Clipboard Server on Windows 10 Version 1607 (build 10.0.14393.0). An unauthorized attacker with local access could exploit this flaw to elevate their privileges. The CVSS 3.1 vector indicates the attack requires local access with high attack complexity and no privileges or user interaction, impacting confidentiality, integrity, and availability with high severity. Microsoft has released a patch to remediate this vulnerability.
Potential Impact
Successful exploitation allows an unauthorized local attacker to elevate privileges, potentially gaining higher-level access to the affected system. This can compromise system confidentiality, integrity, and availability. There are no reports of active exploitation in the wild.
Mitigation Recommendations
A patch is available from Microsoft to address this vulnerability. It is recommended to apply the official update to Windows 10 Version 1607 as soon as possible to mitigate the risk. Since this is not a cloud service, remediation depends on applying the patch on affected endpoints.
CVE-2026-20844: CWE-416: Use After Free in Microsoft Windows 10 Version 1607
Description
Use after free in Windows Clipboard Server allows an unauthorized attacker to elevate privileges locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20844) involves a use-after-free condition in the Windows Clipboard Server on Windows 10 Version 1607 (build 10.0.14393.0). An unauthorized attacker with local access could exploit this flaw to elevate their privileges. The CVSS 3.1 vector indicates the attack requires local access with high attack complexity and no privileges or user interaction, impacting confidentiality, integrity, and availability with high severity. Microsoft has released a patch to remediate this vulnerability.
Potential Impact
Successful exploitation allows an unauthorized local attacker to elevate privileges, potentially gaining higher-level access to the affected system. This can compromise system confidentiality, integrity, and availability. There are no reports of active exploitation in the wild.
Mitigation Recommendations
A patch is available from Microsoft to address this vulnerability. It is recommended to apply the official update to Windows 10 Version 1607 as soon as possible to mitigate the risk. Since this is not a cloud service, remediation depends on applying the patch on affected endpoints.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-03T05:54:20.376Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668adea60475309f9ae0a3
Added to database: 1/13/2026, 6:11:42 PM
Last enriched: 4/3/2026, 12:45:03 PM
Last updated: 5/10/2026, 9:19:02 AM
Views: 92
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