What is CVE-2026-45456?

CVE-2026-45456 is a high-severity vulnerability, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.4/10. Published 2026-06-09.

How severe is CVE-2026-45456?

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

CVE-2026-45456

CVE-2026-45456

Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.

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.

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

References

secure@microsoft.com

Frequently asked questions

What is CVE-2026-45456?: CVE-2026-45456 is a high-severity vulnerability, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.4/10. Published 2026-06-09.
How severe is CVE-2026-45456?: High severity. CVSS v3 base score is 8.4 out of 10.