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CVE-2026-45463

Microsoft Office Remote Code Execution Vulnerability

Published: Jun 9, 2026Updated: Jun 9, 2026 Sources: CVE List NVD
NVD MITRE
8.4CVSS
HIGH

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

EPSS Score
0.1%
Top 75.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

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

Weaknesses

CWE-121CWE-191

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 for Android
Microsoft
Operating Systems / windows
microsoftcommercialUSOperating Systems
and 4 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

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

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45463
msrc.microsoft.com

Timeline

Published
Jun 9, 2026
Last Updated
Jun 9, 2026
News mentions
5

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