CVE-2026-78518
high
Microsoft CVSS v3 Base Score
8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Published: September 8, 2026 (2 days ago)
Last Modified: September 9, 2026
Vendor: Microsoft
Source: NVD
Vulnerability Report
Generated by CyberWatcher
Description
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
CWE
CWE-20Affected Products
microsoft 365 appsmicrosoft excelmicrosoft microsoft 365microsoft office 2016microsoft office 2019microsoft office 2021microsoft office 2024