EUVD-2026-73717
GHSA-8rwg-jwgw-wfj5
Severity by source
AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Local file-open trigger requires PR:L and UI:R; full C/I/A:H reflects arbitrary code execution upon successful overflow.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Microsoft Office Access allows an authorized attacker to execute code locally.
AnalysisAI
Heap-based buffer overflow in Microsoft Office Access enables local code execution with full system impact when a low-privileged user opens a specially crafted database file. Affected products span Access 2016 through Microsoft 365 Apps for Enterprise, covering the majority of Microsoft Office deployments. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the victim is running a locally installed, unpatched version of Microsoft Access (Access 2016, Office 2019, Office LTSC 2021, Office LTSC 2024, or Microsoft 365 Apps for Enterprise below the fixed builds). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.3 (High) score is supported by C:H/I:H/A:H impact metrics, but the attack surface is meaningfully constrained: AV:L restricts exploitation to local access, PR:L requires a low-privileged account, and UI:R mandates that the victim open a malicious file. … 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 Microsoft Update, Windows Update, or the Microsoft Update Catalog; target build versions are Access 2016 16.0.5569.1000 or later, Office 2019 16.0.10417.20207 or later, Office LTSC 2021 16.0.14334.20906 or later, Office LTSC 2024 16.0.17932.20976 or later, and Microsoft 365 Apps for Enterprise 16.0.20326.20138 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running Microsoft Office Access 2016, Access 2019, or Microsoft 365 Apps for Enterprise and document their patch levels. …
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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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