EUVD-2026-43882
GHSA-w9g3-hj99-cjrw
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local privilege escalation needs an existing low-priv account (AV:L, PR:L) with no user interaction and low complexity, yielding full CIA impact within an unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
Null pointer dereference in Windows Image Acquisition allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows Image Acquisition (WIA) affects Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025, where a NULL pointer dereference can be leveraged by an already-authenticated local user to elevate privileges. Microsoft rates it 7.8 (High) with full confidentiality, integrity, and availability impact despite the flaw class typically causing denial of service. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires local access with an existing authenticated low-privileged account (CVSS PR:L, AV:L) and the ability to interact with the Windows Image Acquisition component on an affected build; no user interaction is needed (UI:N) and attack complexity is low (AC:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) describes a locally-exploitable, low-complexity flaw requiring only low existing privileges and no user interaction, yielding high impact - a classic post-compromise privilege-escalation profile useful as a second-stage in an attack chain rather than an initial entry point. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has already gained low-privileged code execution on a Windows 11 24H2/25H2/26H1 or Windows Server 2025 host (for example via phishing or a compromised standard-user account) invokes the Windows Image Acquisition interface with crafted input that drives a NULL pointer dereference, using the resulting condition to elevate to SYSTEM. No user interaction is required and attack complexity is low, though local access and existing credentials are prerequisites; no public exploit code is currently identified. |
| Remediation | Apply the Microsoft security update for CVE-2026-50315 via the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50315; patch availability is confirmed by the vendor, though an exact fixed build/KB number was not provided in the input and should be taken from the MSRC page for each affected release (Windows 11 24H2/25H2/26H1, Windows Server 2025 and Server Core). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: audit inventory systems to identify all Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025 deployments, prioritizing endpoints used by privileged users or handling sensitive data. …
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External POC / Exploit Code
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