EUVD-2026-73410
GHSA-62pf-8266-27mc
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access with low privileges is sufficient; no user interaction needed; full C/I/A impact reflects SYSTEM-level privilege escalation achievable via heap overflow.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Heap-based buffer overflow in Microsoft Account allows an authorized attacker to elevate privileges locally.
Articles & Coverage 1
AnalysisAI
Heap-based buffer overflow in the Microsoft Account component of Windows 11 and Windows Server 2025 enables local privilege escalation to full system access. An authorized local attacker with standard user-level privileges exploits CWE-122 heap corruption to gain complete control over confidentiality, integrity, and availability of the affected host. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid local user account on the affected Windows 11 or Windows Server 2025 system (PR:L, AV:L) - no administrative rights are needed, but the attacker must be able to execute code locally. … 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 accurately reflects a local privilege escalation that requires no special complexity or user interaction once a foothold exists. … 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 vendor-released patches via Windows Update or WSUS. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all Windows 11 and Windows Server 2025 deployments and prioritize mission-critical servers for immediate assessment. …
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Threat intelligence, references, and detailed analysis are available after sign-in.
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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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