EUVD-2026-73143
GHSA-crg7-c55j-hqvx
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only attack requiring low-privilege authenticated session; AC:L because no special heap-spray conditions are described; full C/I/A impact consistent with achieving SYSTEM privileges.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Use after free in Graphic Fonts allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Windows Graphic Fonts subsystem allows any low-privileged, authenticated local user to gain SYSTEM-level access via a use-after-free memory corruption flaw (CWE-416). The vulnerability spans the full breadth of supported and legacy Windows releases - from Windows Server 2012 through Windows 11 26H1 and Windows Server 2025 - making it an enterprise-wide concern. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated local session with at minimum a standard (low-privileged) user account on the target Windows system - this maps to CVSS PR:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects a low-complexity local privilege escalation requiring only a standard user session - no administrative rights, no user interaction, and no special configuration. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the Microsoft security update bringing each Windows installation to the fixed build as specified in the affected versions data: Windows 11 24H2/25H2 to build 10.0.26100.9445 or later, Windows 11 23H2 to 10.0.22631.7582, Windows 10 21H2/22H2 to 10.0.19044/19045.7725, Windows Server 2025 to 10.0.26100.33438, Windows Server 2022 to 10.0.20348.5622, Windows Server 2019 to 10.0.17763.9245, Windows Server 2016 to 10.0.14393.9512, Windows Server 2012 R2 to 6.3.9600.23397, and Windows Server 2012 to 6.2.9200.26349. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Conduct enterprise inventory of all Windows systems to identify affected assets (Windows Server 2012-2025 and Windows 11 releases). …
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Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
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External POC / Exploit Code
Leaving vuln.today