EUVD-2026-73500
GHSA-9m7g-xjc9-2pf8
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only attack (AV:L), race-condition/heap-timing requirement raises AC:H, low-privilege local account required (PR:L); successful escalation yields full SYSTEM access (C:H/I:H/A:H).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Use after free in Windows Embedded Mode Service allows an authorized attacker to elevate privileges locally.
AnalysisAI
Use-after-free in Windows Embedded Mode Service allows a locally authenticated attacker with low privileges to escalate to SYSTEM-level access across virtually all supported Windows versions. The memory corruption occurs when the service accesses a previously freed object, enabling an attacker to manipulate heap layout and execute code in a privileged context. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local authenticated session with at minimum a low-privilege (standard) user account on the target Windows system - PR:L per the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.0 score (AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately characterizes this as a local privilege escalation requiring low-privilege access and high attack complexity - the AC:H reflects the race-condition or heap-grooming timing requirements inherent to UAF exploitation. … 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 vendor-released patches via Windows Update or WSUS targeting the specific build thresholds listed above: Windows 10 1607/Server 2016 to build 10.0.14393.9512 or later, Windows 10 1809/Server 2019 to 10.0.17763.9245 or later, Windows 10 21H2 to 10.0.19044.7725 or later, Windows 10 22H2 to 10.0.19045.7725 or later, Windows Server 2022 to 10.0.20348.5622 or later, Windows 11 23H2 to 10.0.22631.7582 or later, Windows 11 24H2/Server 2025 to 10.0.26100.9445/10.0.26100.33438 or later, Windows 11 25H2 to 10.0.26200.9445 or later, and Windows 11 26H1 to 10.0.28000.2954 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, use your endpoint management or asset inventory system to identify all Windows systems running Embedded Mode Service and determine their current patch levels. …
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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
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