CVE-2026-45460 — Microsoft Office Information Disclosure Vulnerability

Executive Summary

Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.

Overview

4.7

CVSS MEDIUM

Critical

MS Severity

Not Exploited

MS Exploit Status

Exploitation Unlikely

MS Exploit Likelihood

Category Information Disclosure

Weakness CWE-126: Buffer Over-read

Released Jun 9 2026

Last Updated Jun 9 2026

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score 0.00327 — 0.24285 percentile

NVD CVSS 4.7 MEDIUM — matches MSRC

CVSS Vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

ATTACK VECTOR

Local

ATTACK COMPLEXITY

High

PRIVILEGES REQUIRED

None

USER INTERACTION

Required

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

None

AVAILABILITY

None

EXPLOIT CODE MATURITY

Unproven

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 4.1

EPSS Score

0.00327

probability of exploitation in the next 30 days

0.24285 percentile - updated 2026-06-21

View on FIRST.org

Affected Products

12 affected products

Product	KB Article	Severity	Impact	Restart Required
Microsoft 365 Apps for Enterprise for 32-bit Systems	`Click to Run (Security Update)`	Critical	Information Disclosure	No
Microsoft 365 Apps for Enterprise for 64-bit Systems	`Click to Run (Security Update)`	Critical	Information Disclosure	No
Microsoft Office 2019 for 32-bit editions	`Click to Run (Security Update)`	Critical	Information Disclosure	No
Microsoft Office 2019 for 64-bit editions	`Click to Run (Security Update)`	Critical	Information Disclosure	No
Microsoft Office 365 for Mac	`Release Notes (Security Update)`	Critical	Information Disclosure	Maybe
Microsoft Office for Android	`Release Notes (Security Update)`	Critical	Information Disclosure	Maybe
Microsoft Office LTSC 2021 for 32-bit editions	`Click to Run (Security Update)`	Critical	Information Disclosure	No
Microsoft Office LTSC 2021 for 64-bit editions	`Click to Run (Security Update)`	Critical	Information Disclosure	No
Microsoft Office LTSC 2024 for 32-bit editions	`Click to Run (Security Update)`	Critical	Information Disclosure	No
Microsoft Office LTSC 2024 for 64-bit editions	`Click to Run (Security Update)`	Critical	Information Disclosure	No
Microsoft Office LTSC for Mac 2021	`Release Notes (Security Update)`	Critical	Information Disclosure	Maybe
Microsoft Office LTSC for Mac 2024	`Release Notes (Security Update)`	Critical	Information Disclosure	Maybe

Patches

2 patches

Article	Type	Restart
`Click to Run`	Security Update	No
`Release Notes`	Security Update	Maybe

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

0ccbbf129444eb66344ccafb92b00df4, FluddSec

References

MSRC Advisory MITRE NVD