CVE-2026-77898
high
Microsoft CVSS v3 Base Score
7.5
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score
0.5%
Exploitation probability in 30 days
Top 60% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
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
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code over a network.
CWE
CWE-122Affected Products
microsoft 365 appsmicrosoft microsoft 365microsoft office 2019microsoft office 2021microsoft office 2024