CVE-2026-50387 | CVSS 7.8 HIGH

Metadata

CVE ID: CVE-2026-50387
State: PUBLISHED
Assigner: microsoft
Reserved: 2026-06-04 18:55 UTC
Published: 2026-07-14 17:07 UTC
Last updated: 2026-07-14 19:39 UTC
Primary CWE: CWE-121
CWE-121: Stack-based Buffer Overflow
Vendor / Product: Microsoft / Microsoft Office 365 for Mac
Sources: cve.org · NVD

Severity & Metrics

7.8 HIGH CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Affected products (22)

Vendor	Product	Platform	Versions
Microsoft	Microsoft Office 365 for Mac	—	1.0.0 < 16.111.26071215
Microsoft	Microsoft Office for Android	—	16.0.1 < 16.0.20228.20042
Microsoft	Microsoft Office LTSC for Mac 2021	—	16.0.1 < 16.111.26071215
Microsoft	Microsoft Office LTSC for Mac 2024	—	16.0.0 < 16.111.26071215
Microsoft	Windows 10 Version 1607	32-bit Systems,x64-based Systems	10.0.14393.0 < 10.0.14393.9339
Microsoft	Windows 10 Version 1809	32-bit Systems,x64-based Systems	10.0.17763.0 < 10.0.17763.9020
Microsoft	Windows 10 Version 21H2	32-bit Systems,ARM64-based Systems,x64-based Systems	10.0.19044.0 < 10.0.19044.7548
Microsoft	Windows 10 Version 22H2	32-bit Systems,ARM64-based Systems,x64-based Systems	10.0.19045.0 < 10.0.19045.7548
Microsoft	Windows 11 Version 24H2	ARM64-based Systems,x64-based Systems	10.0.26100.0 < 10.0.26100.8875
Microsoft	Windows 11 Version 25H2	ARM64-based Systems,x64-based Systems	10.0.26200.0 < 10.0.26200.8875
Microsoft	Windows 11 version 26H1	ARM64-based Systems,x64-based Systems	10.0.28000.0 < 10.0.28000.2269
Microsoft	Windows Server 2012	x64-based Systems	6.2.9200.0 < 6.2.9200.26226
Microsoft	Windows Server 2012 (Server Core installation)	x64-based Systems	6.2.9200.0 < 6.2.9200.26226
Microsoft	Windows Server 2012 R2	x64-based Systems	6.3.9600.0 < 6.3.9600.23291
Microsoft	Windows Server 2012 R2 (Server Core installation)	x64-based Systems	6.3.9600.0 < 6.3.9600.23291
Microsoft	Windows Server 2016	x64-based Systems	10.0.14393.0 < 10.0.14393.9339
Microsoft	Windows Server 2016 (Server Core installation)	x64-based Systems	10.0.14393.0 < 10.0.14393.9339
Microsoft	Windows Server 2019	x64-based Systems	10.0.17763.0 < 10.0.17763.9020
Microsoft	Windows Server 2019 (Server Core installation)	x64-based Systems	10.0.17763.0 < 10.0.17763.9020
Microsoft	Windows Server 2022	x64-based Systems	10.0.20348.0 < 10.0.20348.5386
Microsoft	Windows Server 2025	x64-based Systems	10.0.26100.0 < 10.0.26100.33158
Microsoft	Windows Server 2025 (Server Core installation)	x64-based Systems	10.0.26100.0 < 10.0.26100.33158

Weakness (CWE)

CWE	Source	Description
CWE-121	cna	CWE-121: Stack-based Buffer Overflow

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.8	HIGH	3.1	cna	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

References (1)

Windows GDI Elevation of Privilege Vulnerability https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50387