EUVD-2026-73573
GHSA-6jjf-hmxf-fff6
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local low-privileged attacker triggers Kerberos heap overflow without user interaction, yielding full host compromise; AV:L and PR:L confirmed by description and CVSS vector.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Kerberos allows an authorized attacker to elevate privileges locally.
AnalysisAI
Heap-based buffer overflow in the Windows Kerberos implementation enables a local low-privileged attacker to escalate privileges to SYSTEM-level, achieving full confidentiality, integrity, and availability compromise of the affected host. The vulnerability spans an exceptionally wide range of Windows versions - from Windows Server 2012 through Windows Server 2025 and Windows 11 26H1 - making the exposure surface very broad. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a low-privileged, locally authenticated user session on the affected Windows host (PR:L, AV: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 scores 7.8, representing a high-severity local privilege escalation. … 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 your Windows version via Windows Update, WSUS, or Microsoft Update Catalog. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a complete inventory of Windows systems to identify all instances running Windows Server 2012, 2016, 2019, 2022, 2025, or Windows 11 version 26H1 and earlier. …
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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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