Windows GDI Elevation of Privilege Vulnerability

CVE-2026-50387 is an elevation of privilege vulnerability in Windows GDI (rated Important, CVSS 7.8).

1 version

Microsoft id: CVE-2026-50387
Products: Windows GDI
Severity: Important
Impact: Elevation of Privilege
CVSS: 7.8
CVSS vector: 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
Exploited: No
Publicly disclosed: No
Exploitability: Exploitation More Likely
Customer action required: Yes
Release: 2026-Jul
Assigned by: Microsoft
Weakness: CWE-121: Stack-based Buffer Overflow
MSRC revision: 1.3
First captured by us: 13 Nov 2026, 15:08 UTC (from our first import of this list)
Microsoft last modified: 6 Oct 2026, 14:00 UTC
Source: Security updates · open the original at Microsoft

Microsoft's revision notes

Revision 1.0, 2026-07-14: Information published.
Revision 1.1, 2026-08-12: Updated an acknowledgement. This is an informational change only.
Revision 1.2, 2026-08-13: Acknowledgement Updated
Revision 1.3, 2026-10-06: Updated an acknowledgement. This is an informational change only.

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

Security updates, 14:00 UTC, 6 Oct

One version so far. If Microsoft edits it, each change shows here with what was removed and added.

First version we captured · 15:08 UTC, 13 Nov
The text as we first saw it
Seen by us 15:08 UTC, 13 Nov · Microsoft's timestamp 14:00 UTC, 6 Oct · Microsoft's page

Last updated 13 Nov 2026, 15:08 UTC