Heap-based buffer overflow in Microsoft Windows and Windows Server - CVE-2026-96084
Published: November 11, 2026
Vulnerability identifier: #VU165729
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-96084
CWE-ID: CWE-122
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges to those of the user account or service account running the affected process.
The vulnerability exists due to a heap-based buffer overflow in Graphic Fonts when handling font-related operations. A local user can trigger a write beyond the bounds of a heap buffer to gain the privileges of the account running the affected process.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-96084
Install security update from vendor's website.
Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7846, 10 22H2 10.0.19045.7846, 11 23H2 10.0.22631.7711, 11 24H2 10.0.26100.9911, 11 24H2 10.0.26100.9974, 11 25H2 10.0.26200.9911, 11 25H2 10.0.26200.9974, 11 26H1 10.0.28000.3501
Windows Server - addressed in versions 2022 10.0.20348.5870, 2025 10.0.26100.33730, 2025 10.0.26100.33822
Windows Server - addressed in versions 2022 10.0.20348.5870, 2025 10.0.26100.33730, 2025 10.0.26100.33822