EUVD-2026-73919
GHSA-8pxx-rfmf-p6v7
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Local file-parse flaw requiring user to open a malicious document; no privileges needed, no write or availability impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
AnalysisAI
Out-of-bounds read in Microsoft Office Excel's file parser allows a local attacker to disclose process memory contents when a victim opens a specially crafted Excel document. Affected across all major release channels including Excel 2016, Office 2019, LTSC 2021, LTSC 2024, Microsoft 365 Apps for Enterprise, and Mac variants. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to actively open a specially crafted Excel file on a system running an unpatched version of Excel or Microsoft Office. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 5.5 score reflects a moderate but real information-disclosure risk. … 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 or the Microsoft Update Catalog; the specific fixed builds per channel are: Office 2016/Excel 2016 → 16.0.5569.1003, Office 2019 → 16.0.10417.20204, Office LTSC 2021 → 16.0.14334.20896, Office LTSC 2024 → 16.0.17932.20960, Microsoft 365 Apps for Enterprise → 16.0.20326.20136. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Information Disclosure
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External POC / Exploit Code
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