EUVD-2026-56327
GHSA-j57f-8j97-x258
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only attack vector with low-privilege account sufficient; heap overflow in a SYSTEM-context service yields full triad impact with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Display Enhancement Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation via heap-based buffer overflow in Windows Display Enhancement Service allows a local low-privileged attacker to gain SYSTEM-level control across a broad swath of Windows desktop and server releases. The vulnerability carries a CVSS 7.8 High score with full confidentiality, integrity, and availability impact upon successful exploitation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an attacker to already possess local code execution capability under a standard (low-privileged) Windows user account - this satisfies the PR:L prerequisite in the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 High score is consistent with a local privilege escalation (LPE) class vulnerability: network-unreachable (AV:L) but mechanically straightforward (AC:L) and fully impactful (C:H/I:H/A:H). … 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 | The primary remediation is to apply the Microsoft-released security update that brings each affected build to or beyond the patched threshold version: Windows Server 2025 to build 10.0.26100.33296 or later; Windows Server 2022 to 10.0.20348.5499 or later; Windows Server 2019 to 10.0.17763.9115 or later; Windows 11 24H2/25H2 to 10.0.26100.9168 / 10.0.26200.9168 or later; Windows 11 23H2 to 10.0.22631.7517 or later; Windows 11 26H1 to 10.0.28000.2704 or later; Windows 10 21H2/22H2 to 10.0.19044.7663 / 10.0.19045.7663 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Within 24 hours, identify and inventory all Windows 10, 11, and Windows Server 2019-2025 installations in your environment. …
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External POC / Exploit Code
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