EUVD-2026-73242
GHSA-3r29-9xxv-2j95
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-delivered file requires only user interaction to trigger; no authentication needed; full CIA impact on affected system with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Microsoft Office Access allows an unauthorized attacker to execute code over a network.
AnalysisAI
Heap-based buffer overflow (CWE-122) in Microsoft Office Access enables network-delivered remote code execution across six Microsoft Office product lines. When a victim opens a maliciously crafted Access database file delivered over a network, the overflow corrupts heap memory and allows an attacker to execute arbitrary code with the privileges of the logged-in user. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to actively open or interact with a malicious Microsoft Access database file sourced from a network location, satisfying the UI:R condition in the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score reflects a high-severity, network-accessible vulnerability with low complexity and no privilege requirements, limited only by the need for user interaction (UI:R). … 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 Microsoft's released security patches which provide fixed builds across all affected product lines: Office LTSC 2024 to 16.0.17932.20976 or later, Office LTSC 2021 to 16.0.14334.20906 or later, Access 2016 (both standard and 32-bit) to 16.0.5569.1002 or later, Microsoft 365 Apps for Enterprise to 16.0.20326.20138 or later, Office 2019 to 16.0.10417.20207 or later, and Office 2016 to 16.0.5569.1000 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all installed Microsoft Office versions across the enterprise and communicate to end users that they should not open unsolicited database files or documents from untrusted sources until patches are applied. …
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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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