EUVD-2026-35753
GHSA-9v4q-pmfw-6hgx
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3DescriptionCVE.org
Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Windows Desktop Window Manager (DWM) Core Library allows an authenticated low-privilege attacker to gain higher privileges through a use-after-free memory corruption flaw. The vulnerability carries a CVSS score of 7.8 with high impact across confidentiality, integrity, and availability, and no public exploit identified at time of analysis. Successful exploitation typically yields SYSTEM-level code execution on the affected Windows host.
Technical ContextAI
The Desktop Window Manager (DWM) is a core Windows graphics subsystem responsible for compositing the desktop, managing window rendering, and providing visual effects such as transparency and live thumbnails. The DWM Core Library runs with elevated privileges and handles object lifecycle for graphical resources shared between user-mode processes and the compositor. CWE-416 (Use After Free) indicates that a pointer to memory is dereferenced after the underlying object has been freed, allowing an attacker who can control the reallocated memory contents to corrupt program state, hijack control flow, or escalate privileges within the DWM process context.
RemediationAI
Apply the Microsoft security update referenced in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44802 during the next Patch Tuesday cycle; patch status from the supplied data is best characterized as Patch available per vendor advisory, with specific KB numbers and build versions to be confirmed against the MSRC update guide for each affected Windows SKU. There is no practical workaround for a DWM Core Library flaw because DWM cannot be safely disabled on modern Windows without breaking the desktop shell, so compensating controls should focus on reducing local-attacker exposure: restrict interactive logon rights to trusted users via Group Policy, enforce application allowlisting (WDAC/AppLocker) to block unsigned local binaries, deploy EDR with kernel and graphics-subsystem telemetry to detect anomalous DWM child behavior, and prioritize patching on multi-user systems, RDS/Citrix hosts, and developer workstations where local code execution by lower-privileged accounts is most plausible.
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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