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CVE-2026-45645

Microsoft Office Remote Code Execution Vulnerability

Published: Jun 9, 2026Updated: Jun 9, 2026 Sources: CVE List NVD
7.8CVSS
HIGH

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

EPSS Score
0.1%
Top 76.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:LAC:LPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High

Weaknesses

Affected Products

Microsoft 365 Apps for Enterprise
Microsoft
Operating Systems / windows
Microsoft Office 2016
Microsoft
Operating Systems / windows
Microsoft Office 2019
Microsoft
Operating Systems / windows
Microsoft Office 365 for Mac
Microsoft
Operating Systems / windows
Microsoft Office LTSC 2021
Microsoft
Operating Systems / windows
and 3 more affected products View all →

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

Timeline

Published
Jun 9, 2026
Last Updated
Jun 9, 2026
3

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