CVE-2026-21219: CWE-416: Use After Free in Microsoft Windows SDK
Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the Inbox COM Objects component of the Microsoft Windows SDK. Exploitation could allow an unauthorized local attacker to execute arbitrary code. The vulnerability is identified as CWE-416 and affects version 26100 of the Windows SDK. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation could lead to local code execution with high impact on confidentiality, integrity, and availability. The attacker requires local access and user interaction, and the attack complexity is high. No known exploits are currently reported in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the provided patch from the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21219 to remediate this vulnerability.
CVE-2026-21219: CWE-416: Use After Free in Microsoft Windows SDK
Description
Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally.
CVSS v3.1
Score 7.0high
Affected software
Microsoft
Windows SDK
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition in the Inbox COM Objects component of the Microsoft Windows SDK. Exploitation could allow an unauthorized local attacker to execute arbitrary code. The vulnerability is identified as CWE-416 and affects version 26100 of the Windows SDK. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation could lead to local code execution with high impact on confidentiality, integrity, and availability. The attacker requires local access and user interaction, and the attack complexity is high. No known exploits are currently reported in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the provided patch from the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21219 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-11T21:02:05.731Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21219","vendor":"Microsoft"}]
Threat ID: 69668ae6a60475309f9ae274
Added to database: 01/13/2026, 18:11:50 UTC
Last enriched: 07/30/2026, 23:53:38 UTC
Last updated: 09/10/2026, 22:25:46 UTC
Views: 909
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