What is CVE-2026-32221?

CVE-2026-32221 is a high-severity vulnerability in Microsoft Windows 11 Version 24h2, classified under Heap-based Buffer Overflow. CVSS score: 8.4/10. Published 2026-04-14.

How severe is CVE-2026-32221?

High severity. CVSS v3 base score is 8.4 out of 10.

Buffer overflow in Microsoft Windows 11 Version 24h2

CVE-2026-32221

Heap-based buffer overflow in Microsoft Graphics Component allows an unauthorized attacker to execute code locally.

Vulnerability class: Buffer Overflow

EPSS: 0.001 (19.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C.

Affected products

Microsoft Windows 11 Version 24h2 — versions 10.0.26100.0
Microsoft Windows 11 Version 25h2 — versions 10.0.26200.0
Microsoft Windows 11 Version 26h1 — versions 10.0.28000.0
Microsoft Windows Server 2025 — versions 10.0.26100.0
Microsoft Windows Server 2025 (Server Core Installation) — versions 10.0.26100.0

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

Windows Graphics Component Remote Code Execution Vulnerability (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-32221?: CVE-2026-32221 is a high-severity vulnerability in Microsoft Windows 11 Version 24h2, classified under Heap-based Buffer Overflow. CVSS score: 8.4/10. Published 2026-04-14.
How severe is CVE-2026-32221?: High severity. CVSS v3 base score is 8.4 out of 10.