CVE-2026-55054

medium Microsoft
CVSS v3 Base Score
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS Score
0.6%
Exploitation probability in 30 days
Top 54% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Published: July 14, 2026 (54 days ago)
Last Modified: July 15, 2026
Vendor: Microsoft
Source: NVD

Description

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

CWE

CWE-125

Affected Products

microsoft 365 appsmicrosoft excelmicrosoft officemicrosoft office 2021microsoft office 2024microsoft office online servermicrosoft office 365

References

🔗 msrc.microsoft.com