EUVD-2026-73768
GHSA-wm2c-hf27-2q4m
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local attacker with standard user session exploits kernel driver heap overflow; PR:L reflects required existing foothold, AV:L is correct as remote triggering is not indicated.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Services for NFS ONCRPC XDR Driver allows an authorized attacker to elevate privileges locally.
AnalysisAI
Heap-based buffer overflow in the Windows Services for NFS ONCRPC XDR Driver enables a locally authenticated attacker with standard user privileges to escalate to SYSTEM on a wide range of Windows and Windows Server releases. The affected component handles ONC RPC data serialization for NFS operations; triggering the overflow requires only an existing local session and no user interaction. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Windows Services for NFS must be explicitly installed on the target system - specifically the ONCRPC XDR Driver must be present and operational. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score with AV:L/AC:L/PR:L/UI:N reflects a local privilege escalation that is technically straightforward once an attacker has a foothold - low attack complexity means no heap grooming or timing dependency is required. … 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 Microsoft's patch for the specific Windows build in use, as documented in the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-73024. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, audit your environment to identify all systems with Windows NFS services enabled and assess which handle critical data or services. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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