EUVD-2026-35648
GHSA-7rc8-chgg-9grf
Severity by source
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
AnalysisAI
Local code execution in Microsoft Office via a heap-based buffer overflow allows an unauthorized attacker to run arbitrary code with the privileges of the user opening a malicious document. The CVSS vector (AV:L/PR:N/UI:N) indicates local attack vector without required authentication or user interaction, an unusual combination that warrants verification against the vendor advisory. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Per the CVSS vector the attacker must already have local access to the system (AV:L) but requires no privileges (PR:N) and no user interaction (UI:N) - an unusual combination for an Office parsing bug that should be verified against the Microsoft advisory, since the description's phrasing 'execute code locally' more typically describes the document-open scenario where a user opens an attacker-supplied file. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 8.4 with full CIA impact reflects high consequence if triggered, but the vector contains an internal inconsistency worth flagging: AV:L (local) is typically paired with PR:L or UI:R for Office bugs, yet this vector lists PR:N and UI:N - meaning the scoring asserts an attacker already with local presence can trigger the bug without authentication or user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker delivers a maliciously crafted Office document - typically by email, SharePoint link, or instant message - that contains a malformed structure designed to corrupt the heap when parsed by the targeted Office application. When the user opens the file (and depending on whether Protected View intercepts the parse path), the use-after-free is triggered, an attacker-controlled object is reclaimed in the freed slot, and execution diverts to shellcode that runs with the user's privileges, enabling credential theft, persistence, or lateral movement. … |
| Remediation | Patch available per vendor advisory - apply the Microsoft security update referenced at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45472 via Microsoft Update, WSUS, Intune, or your standard Office update channel (Click-to-Run for Microsoft 365 Apps, MSI for volume-licensed editions). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory Microsoft Office deployments across the organization and document current patch and version status. …
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Same weakness CWE-416 – Use After Free
View allSame technique Buffer Overflow
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External POC / Exploit Code
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