EUVD-2026-56349
GHSA-m24g-q7xm-f893
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Local-only read primitive requiring a standard user session; no integrity or availability impact from an out-of-bounds read alone.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Out-of-bounds read in Windows DWM Core Library allows an authorized attacker to disclose information locally.
AnalysisAI
Out-of-bounds memory read in Windows Desktop Window Manager (DWM) Core Library exposes sensitive memory contents to locally authenticated attackers across a broad range of Windows client and server versions. Exploitation requires an authenticated local session with at least low-privilege access (PR:L per CVSS), making this an insider-threat or post-compromise escalation primitive rather than an initial-access vector. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires an existing authenticated local session with at minimum a standard (low-privileged) user account - confirmed by CVSS PR:L and the vendor description phrase 'authorized attacker.' No special Windows features, non-default configuration, or specific OS mode is identified as a prerequisite; the DWM Core Library is loaded by default on all affected Windows desktop and server-with-GUI installations. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 5.5 Medium score accurately reflects the constrained threat model: AV:L limits exploitation to users with an existing local session, AC:L indicates no special bypass is needed once access is obtained, and PR:L confirms a standard (non-admin) user account suffices. … 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 | Vendor-released patch: Apply the July 2026 Microsoft Patch Tuesday cumulative updates targeting the specific build thresholds listed per OS version (e.g., Windows 11 24H2 to 10.0.26100.9168 or later; Windows Server 2019 to 10.0.17763.9115 or later). … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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