What is CVE-2026-47635?

CVE-2026-47635 is a high-severity vulnerability in Microsoft Office Ltsc 2024, classified under Heap-based Buffer Overflow. CVSS score: 8.4/10. Published 2026-06-09.

How severe is CVE-2026-47635?

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

Buffer overflow in Microsoft Office Ltsc 2024

CVE-2026-47635

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

Vulnerability class: Buffer Overflow

EPSS: 0.003 (25.8th 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.

Affected products

Microsoft Office Ltsc 2024 — versions 16.0.0
Microsoft Office_2024

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

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

Frequently asked questions

What is CVE-2026-47635?: CVE-2026-47635 is a high-severity vulnerability in Microsoft Office Ltsc 2024, classified under Heap-based Buffer Overflow. CVSS score: 8.4/10. Published 2026-06-09.
How severe is CVE-2026-47635?: High severity. CVSS v3 base score is 8.4 out of 10.