Cyber Resilience

CVE-2026-21219

High

Published: 13 January 2026

Published
13 January 2026
Modified
09 February 2026
KEV Added
—
Patch
—
CVSS Score v3.1 7.0 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.0005 17.1th percentile
Risk Priority 14 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-21219 is a high-severity Use After Free (CWE-416) vulnerability in Microsoft Windows Software Development Kit. Its CVSS base score is 7.0 (High).

Operationally, ranked at the 17.1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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

CWE(s)
CWE-416

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

microsoft
windows software development kit
10.0.26100 — 10.0.26100.7463

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-416

Use-after-free exploits that achieve arbitrary code execution are blocked or significantly hardened by non-executable pages and ASLR.

References