EUVD-2026-73312
GHSA-xp46-93wc-4qjg
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-delivered document requires passive user open (UI:R, PR:N); AC:L because no heap-grooming precondition is described; full C/I/A impact consistent with arbitrary code execution.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
AnalysisAI
Heap-based buffer overflow in Microsoft Office Word enables remote unauthenticated code execution when a victim opens a specially crafted document. Affects the full breadth of Office deployments - Microsoft 365 Apps for Enterprise, Office 2019, Office LTSC 2021/2024, Word 2016, and their Mac equivalents - making the attack surface extremely wide. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The victim must open a specially crafted Word document using an unpatched version of any affected product (Microsoft 365, Word 2016, Office 2019, LTSC 2021/2024, or their Mac equivalents). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 8.8 with AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H reflects a genuine high-severity issue. … 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 patch immediately via Microsoft Update, Microsoft 365 Admin Center, or WSUS/Intune for enterprise deployments. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct comprehensive inventory of all Microsoft Office installations across the enterprise including Microsoft 365 Apps for Enterprise, Office 2019, Office LTSC 2021/2024, Word 2016, and Mac equivalents; create prioritized deployment schedule with internet-facing and high-value systems first. …
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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
Leaving vuln.today