EUVD-2026-56689
GHSA-vf7p-72jw-ch4x
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Local file-based delivery requires victim interaction; no attacker privileges needed to craft the malicious document; impact is confidentiality-only with no integrity or availability effect.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Lifecycle Timeline
3DescriptionCVE.org
Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.
AnalysisAI
Out-of-bounds read in Microsoft Office exposes sensitive memory contents to local attackers who can socially engineer a victim into opening a malicious document. Affected products span Office 2019, LTSC 2021, LTSC 2024, and Microsoft 365 Apps for Enterprise across both Windows and macOS. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to actively open an attacker-supplied Office document on a machine running one of the affected product versions (UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The overall risk profile is moderate in severity but low in operational urgency for most environments. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious Office document (such as a .docx or .xlsx) containing a specially structured data object that triggers the out-of-bounds read during Office's parsing routine. The file is delivered via phishing email or a shared drive, and when the victim opens it on an unpatched installation, adjacent process memory - potentially containing in-memory credentials, authentication tokens, or sensitive document content - is disclosed. … |
| Remediation | Apply the vendor-released patch as the primary fix. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
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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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