What is CVE-2026-81353?

CVE-2026-81353 is a high-severity vulnerability in Microsoft Heif Image Extension, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-09-08.

How severe is CVE-2026-81353?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Microsoft Heif Image Extension

CVE-2026-81353

Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to execute code locally.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Microsoft Heif Image Extension

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-81353?: CVE-2026-81353 is a high-severity vulnerability in Microsoft Heif Image Extension, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-09-08.
How severe is CVE-2026-81353?: High severity. CVSS v3 base score is 7.8 out of 10.