EUVD-2026-73790
GHSA-qh8g-v37g-3mg6
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-delivered malicious document requires only user interaction; no privileges needed; full CIA impact on successful exploitation in user context.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Null pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in Microsoft Office Word allows an unauthenticated network attacker to execute arbitrary code on a victim's machine by delivering a specially crafted document that triggers a null pointer dereference. Affected versions span Microsoft Word 2016, Office 2019, Office LTSC 2021, Office LTSC 2024, Microsoft 365 Apps for Enterprise, and Office LTSC for Mac variants. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that a victim open or preview a specially crafted Office document delivered by the attacker - this is the sole prerequisite (UI:R per CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) reflects high real-world risk given Office's ubiquity and the ease of delivering malicious documents via phishing. … 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 immediately via Microsoft Update or Microsoft Update Catalog, targeting the following minimum fixed builds: Word 2016 → 16.0.5569.1000; Office 2019 → 16.0.10417.20207; Office LTSC 2021 → 16.0.14334.20906; Microsoft 365 Apps for Enterprise → 16.0.20326.20138; Office LTSC 2024 → 16.0.17932.20976. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all Office installations across your environment (Word 2016, Office 2019, Office LTSC 2021, Office LTSC 2024, and Microsoft 365 Apps for Enterprise deployments) and immediately restrict document preview capabilities in email clients. …
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Same weakness CWE-476 – NULL Pointer Dereference
View allSame technique Null Pointer Dereference
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External POC / Exploit Code
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