EUVD-2026-73842
GHSA-f7m9-p994-pr6w
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Network-delivered malicious document requires user interaction but no attacker authentication; impact is confidentiality-only with no integrity or availability effect.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Use of uninitialized resource in Microsoft Office allows an unauthorized attacker to disclose information over a network.
AnalysisAI
Uninitialized resource use (CWE-908) in Microsoft Office exposes high-confidentiality data to remote unauthenticated attackers when a victim opens a specially crafted Office document. The vulnerability spans the full Microsoft Office ecosystem - Office 2016, 2019, LTSC 2021/2024, Microsoft 365 Apps for Enterprise, and Mac variants - making the affected surface extremely broad. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | User interaction is required: the victim must open or preview a specially crafted Office document file. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score is 6.5 (Medium), driven by C:H with no integrity or availability impact, and the requirement for user interaction (UI:R) that caps exploitability below fully automated attacks. … 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 | Vendor-released patches are available for all Windows-platform variants. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-908 – Use of Uninitialized Resource
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External POC / Exploit Code
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