EUVD-2026-43916
GHSA-vrq2-m64r-469m
Severity by source
AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Authorized attacker (PR:L) over the network (AV:N) must win a timing-sensitive race (AC:H); successful EoP yields full C/I/A impact within an unchanged scope.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Media allows an authorized attacker to elevate privileges over a network.
AnalysisAI
Elevation of privilege in the Windows Media component of Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025 allows an already-authorized (PR:L) network attacker to win a race condition and gain higher privileges, with full confidentiality, integrity, and availability impact. Microsoft self-reported the flaw and has released a patch; there is no public exploit identified at time of analysis and it is not on the CISA KEV list. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already possess low-level authorization (CVSS PR:L - a valid authenticated account or session) and network reachability to the Windows Media functionality on an affected host; no user interaction is needed (UI:N). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a mid-tier priority (CVSS 7.5) rather than a drop-everything issue. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who already holds a low-privileged, authenticated foothold on or network access to an affected Windows 11 or Windows Server 2025 host repeatedly triggers the vulnerable Windows Media operation while racing a second thread to corrupt shared state at the precise check-to-use moment. On a successful race, the attacker elevates to higher privileges and gains full read/write/impact on the system. … |
| Remediation | Apply the Microsoft security update for CVE-2026-50414 (Patch available per vendor advisory) via the monthly cumulative update for each affected release - Windows 11 24H2/25H2/26H1 and Windows Server 2025 including Server Core - using the fixed build numbers published at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50414. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 11 (24H2, 25H2, 26H1) and Windows Server 2025 systems to quantify exposure. …
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External POC / Exploit Code
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