Vulnerability in Microsoft 365 Apps
CVE-2026-45460
Buffer over-read in Microsoft Office allows an unauthorized attacker to disclose information locally.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (33.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Microsoft 365 Apps
- Microsoft 365 Copilot
- Microsoft 365
- Microsoft 365 Apps For Enterprise — versions 16.0.1
- Microsoft Office 2019 — versions 19.0.0
- Microsoft Office 365 For Mac — versions 1.0.0
- Microsoft Office For Android — versions 16.0.1
- Microsoft Office Ltsc 2021 — versions 16.0.1
- Microsoft Office Ltsc 2024 — versions 16.0.0
- Microsoft Office Ltsc For Mac 2021 — versions 16.0.1
Weakness classification (CWE)
References
- Microsoft Office Information Disclosure Vulnerability (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-45460?
- CVE-2026-45460 is a medium-severity vulnerability in Microsoft 365 Apps, classified under Buffer Over-read. CVSS score: 4.7/10. Published 2026-06-09.
- How severe is CVE-2026-45460?
- Medium severity. CVSS v3 base score is 4.7 out of 10.