EUVD-2026-73205
GHSA-fff6-7p8q-9gxc
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only privilege escalation (AV:L) requiring heap-layout control (AC:H) and a low-privileged account (PR:L); full CIA reflects SYSTEM-level kernel compromise upon success.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Kernel allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation to SYSTEM level is achievable in the Windows Kernel across Windows 10, Windows 11, and Windows Server 2016 through 2025 via a heap-based buffer overflow (CWE-122). A local attacker with standard user credentials can trigger the overflow under high-complexity conditions to fully compromise kernel security structures, achieving complete confidentiality, integrity, and availability impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a local, authenticated attacker with at minimum a standard (low-privileged) Windows user account - PR:L in the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.0 score (AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects a local privilege escalation constrained by high attack complexity, meaning reliable exploitation typically demands a controlled heap layout, kernel object spray, or race-condition window rather than a trivial one-shot trigger. … 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 for the relevant Windows build via Windows Update, WSUS, or Microsoft Update Catalog as documented at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68884. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all Windows 10, Windows 11, and Windows Server 2016-2025 systems and verify current Microsoft security update status. …
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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
Leaving vuln.today