EUVD-2026-73432
GHSA-2m58-vm8w-cpww
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only exploitation requiring only a low-privilege session; full system impact post-overflow but no scope change across machine boundaries.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows DCOM Server allows an authorized attacker to elevate privileges locally.
AnalysisAI
Heap-based buffer overflow in Windows DCOM Server enables a locally authenticated, low-privilege attacker to escalate to SYSTEM-level on affected hosts via a malformed DCOM activation or marshaling request. The vulnerability (CWE-122) spans effectively the entire active Microsoft Windows ecosystem - from end-of-life Server 2012 through current Windows 11 26H1 and Server 2025 - amplifying aggregate exposure significantly. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a locally authenticated session with at least low privileges on the target system (PR:L per CVSS vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 3.1 rates this 7.8 (High) with AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. … 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 distributed through Windows Update, WSUS, or Microsoft Update Catalog; consult the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69284 for the specific KB article per affected product. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: identify and inventory all affected Windows systems (Server 2012 through Server 2025, Windows Vista through Windows 11 26H1) and assess which allow low-privilege local authentication via domain users, service accounts, or RDP sessions. …
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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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