Use After Free in Inbox COM Objects Affects Microsoft Products
CVE-2026-21219

7HIGH

Key Information:

Vendor

Microsoft
Status
Windows Sdk
Vendor
CVE Published:
13 January 2026

What is CVE-2026-21219?

The vulnerability in Inbox COM Objects arises from a use-after-free error that can be exploited by an attacker to execute code locally. This flaw potentially allows unauthorized users to leverage the vulnerability for malicious purposes, impacting the security posture of affected systems.

Affected Version(s)

Windows SDK 26100 < 10.0.26100.7463

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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