EUVD-2026-35539
GHSA-mghm-jr32-gfh3
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Primary rating from NVD.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Lifecycle Timeline
4DescriptionNVD
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.
AnalysisAI
Out-of-bounds read in Microsoft Excel exposes limited memory contents to a local attacker when a user opens a specially crafted workbook. Affected product lines span Excel 2016, Office 2019, Office LTSC 2021/2024, Microsoft 365 Apps for Enterprise, Office Online Server, and multiple Mac variants. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Per CVSS AV:L, exploitation requires local access - the attacker must be able to deliver a malicious file to a system where the vulnerable Excel version is installed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The overall real-world risk is LOW based on converging signals: CVSS 3.3 (Low), local attack vector (AV:L) requiring user interaction (UI:R), confidentiality impact limited to partial memory disclosure (C:L), and no integrity or availability consequence. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious Excel workbook embedding a specially formed record or object structure designed to trigger the out-of-bounds read in Excel's parser. The file is delivered to a target user via email, file share, or web download, and when the user opens the workbook, Excel reads beyond the bounds of an allocated buffer, leaking a small amount of adjacent memory content back to the attacker. … |
| Remediation | The primary remediation is to apply the vendor-released patch via Microsoft's standard update channels. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Local code execution in Microsoft Office Word is possible when a user opens a maliciously crafted document that triggers
Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Buffer Overflow
View allShare
External POC / Exploit Code
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