What’s Vulnerable › Vulnerabilities

CVE-2026-21219: Inbox COM Objects (Global Memory) Remote Code Execution Vulnerability

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-13 · updated 2026-07-30
• Weakness: CWE-416

Description

Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally.

Affected products

• Microsoft Windows SDK: from 10.0.26100 before 10.0.26100.7463 — fixed in 10.0.26100.7463
• Microsoft Windows SDK: from 26100 before 10.0.26100.7463 — fixed in 10.0.26100.7463

How to fix

Upgrade to a fixed version: Microsoft Windows SDK 10.0.26100.7463; Microsoft Windows SDK 10.0.26100.7463. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21219

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