CVE-2026-45469

high Microsoft
CVSS v3 Base Score
7.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score
0.3%
Exploitation probability in 30 days
Top 79% most likely to be exploited
Attack Characteristics
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Published: June 9, 2026 (30 days ago)
Last Modified: June 19, 2026
Vendor: Microsoft
Source: NVD

Description

Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CWE

CWE-122

Affected Products

microsoft 365 appsmicrosoft excelmicrosoft microsoft 365microsoft office 2019microsoft office 2021microsoft office 2024microsoft office online server

References

🔗 msrc.microsoft.com