Use After Free in Microsoft Windows Sdk
CVE-2026-21219
Use after free in Inbox COM Objects allows an unauthorized attacker to execute code locally.
Vulnerability class: Use-After-Free
EPSS: 0.003 (25.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Microsoft Windows Sdk — versions 26100
- Microsoft Windows_software_development_kit
Weakness classification (CWE)
References
- secure@microsoft.com (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-21219?
- CVE-2026-21219 is a high-severity vulnerability in Microsoft Windows Sdk, classified under Use After Free. CVSS score: 7.0/10. Published 2026-01-13.
- How severe is CVE-2026-21219?
- High severity. CVSS v3 base score is 7.0 out of 10.