Review reviewHigh

CVE-2026-50387

Microsoft Microsoft Office 365 for Mac, Microsoft Office for Android, Microsoft Office LTSC for Mac 2021

Stack-based buffer overflow in Windows GDI allows an authorized attacker to elevate privileges locally.

PRIORITY ASSESSMENT

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability1.92%

Technical severityCVSS 7.8

Stack-based buffer overflow in Windows GDI allows an authorized attacker to elevate privileges locally.

Product: Microsoft Microsoft Office 365 for Mac, Microsoft Office for Android, Microsoft Office LTSC for Mac 2021
Affected versions: >= 1.0.0 < 16.111.26071215, >= 16.0.1 < 16.0.20228.20042, >= 16.0.1 < 16.111.26071215, >= 16.0.0 < 16.111.26071215, >= 10.0.14393.0 < 10.0.14393.9339, >= 10.0.17763.0 < 10.0.17763.9020, >= 10.0.19044.0 < 10.0.19044.7548, >= 10.0.19045.0 < 10.0.19045.7548, >= 10.0.26100.0 < 10.0.26100.8875, >= 10.0.26200.0 < 10.0.26200.8875, >= 10.0.28000.0 < 10.0.28000.2525, >= 6.2.9200.0 < 6.2.9200.26226, >= 6.3.9600.0 < 6.3.9600.23291, >= 10.0.20348.0 < 10.0.20348.5386, >= 10.0.26100.0 < 10.0.26100.33158, < 10.0.14393.9339, < 10.0.17763.9020, < 10.0.19044.7548, < 10.0.19045.7548, < 10.0.26100.8875
Fixed versions: 10.0.14393.9339, 10.0.17763.9020, 10.0.19044.7548, 10.0.19045.7548, 10.0.26100.8875, 10.0.26200.8875, 10.0.28000.2269, 10.0.28000.2525, 10.0.20348.5386, 10.0.26100.33158

Confirm exposure before applying a vendor-supported change.

1
Identify
Confirm that Microsoft Microsoft Office 365 for Mac, Microsoft Office for Android, Microsoft Office LTSC for Mac 2021 and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.