What is CVE-2026-45649?

CVE-2026-45649 is a high-severity vulnerability in Microsoft Excel, classified under Improper Access Control. CVSS score: 7.1/10. Published 2026-06-09.

How severe is CVE-2026-45649?

High severity. CVSS v3 base score is 7.1 out of 10.

Vulnerability in Microsoft Excel

CVE-2026-45649

Improper access control in Office for Android allows an unauthorized attacker to perform spoofing locally.

EPSS: 0.004 (34.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

Affected products

Microsoft Excel
Microsoft Excel For Android — versions 16.0.0.0
Microsoft Powerpoint For Android — versions 16.0.0.0
Microsoft Word For Android — versions 16.0.0.0
Microsoft Powerpoint
Microsoft Word

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

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

Frequently asked questions

What is CVE-2026-45649?: CVE-2026-45649 is a high-severity vulnerability in Microsoft Excel, classified under Improper Access Control. CVSS score: 7.1/10. Published 2026-06-09.
How severe is CVE-2026-45649?: High severity. CVSS v3 base score is 7.1 out of 10.