Description
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
patch
Microsoft Office Remote Code Execution Vulnerability
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55017
Scores
CVSS v3
7.8
EPSS
0.0030
EPSS Percentile
22.7%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-122
Status
published
Products (10)
microsoft/365_apps
(2 CPE variants)
Microsoft/Microsoft 365 Apps for Enterprise
16.0.1 - https://aka.ms/OfficeSecurityReleases
Microsoft/Microsoft Office 2016
16.0.0 - 16.0.5561.1000
Microsoft/Microsoft Office 2019
19.0.0 - https://aka.ms/OfficeSecurityReleases
Microsoft/Microsoft Office LTSC 2021
16.0.1 - https://aka.ms/OfficeSecurityReleases
Microsoft/Microsoft Office LTSC 2024
16.0.0 - https://aka.ms/OfficeSecurityReleases
microsoft/office_2016
(2 CPE variants)
microsoft/office_2019
(2 CPE variants)
microsoft/office_2021
(2 CPE variants)
microsoft/office_2024
(2 CPE variants)
Published
Jul 14, 2026
Tracked Since
Jul 14, 2026