EUVD-2026-56695
GHSA-hr7x-mhcm-mj4v
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Local file-parsing flaw with no privileges needed, but mandatory user interaction; confidentiality-only impact 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 (CWE-125) in Microsoft Office enables a local, unauthenticated attacker to disclose sensitive memory contents by convincing a user to open a specially crafted Office document. Affected products span the full modern Office portfolio - Office 2016 through Office LTSC 2024 and Microsoft 365 Apps for Enterprise. …
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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 Office document on a system running an affected Microsoft Office version - user interaction (UI:R) is a hard prerequisite confirmed by the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 5.5 (Medium) reflects a local attack vector with required user interaction and no integrity or availability impact, which accurately constrains the real-world risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious Office document containing malformed record structures designed to trigger an out-of-bounds read in the file parser. The document is delivered to a target via email, file share, or download, and the victim opens it in an affected Office version. … |
| Remediation | Apply the vendor-released patch via Microsoft Update or the Microsoft 365 admin center. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-125 – Out-of-bounds Read
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External POC / Exploit Code
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