EUVD-2026-73200
GHSA-v37x-22cx-h4pm
Severity by source
AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Network vector accepted per description 'over a network'; AC:H reflects UAF heap-state or race-condition precision requirement; PR:L and UI:R per 'authorized attacker' and required interaction; full C/I/A from kernel-level compromise.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use after free in Windows Kernel allows an authorized attacker to elevate privileges over a network.
AnalysisAI
Privilege escalation via use-after-free in the Windows Kernel exposes an enormous swath of the Microsoft ecosystem - spanning Windows 10 1607 and Server 2012 through Windows 11 26H1 and Server 2025 - to network-reachable elevation of privilege by an authenticated attacker. The CVSS vector (AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H) indicates that exploitation is constrained by high complexity and a required victim interaction, but a successful attack yields full kernel-level confidentiality, integrity, and availability impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the attacker holds at least a low-privileged authenticated account on or with network access to the target system (PR:L) - anonymous or unauthenticated network exploitation is not indicated by the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 7.1 correctly captures meaningful exploitation constraints: AC:H demands race-condition or heap-grooming precision, PR:L requires a valid authenticated session, and UI:R necessitates a victim action - collectively making opportunistic mass exploitation more difficult than a straightforward network-unauthenticated bug. … 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 Microsoft security update corresponding to each affected Windows version via Windows Update or WSUS; the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68846 is the authoritative source. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a complete inventory of all Windows systems by version and criticality, and confirm patch availability from Microsoft for each affected version. …
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Same weakness CWE-416 – Use After Free
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External POC / Exploit Code
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