EUVD-2026-56567
GHSA-h7qr-m9m5-24w9
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Local file-open required (AV:L), user must interact (UI:R), no privileges needed; only confidentiality impacted with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
3DescriptionNVD
Improper input validation in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information locally.
AnalysisAI
Local information disclosure in Microsoft Office PowerPoint exposes sensitive data when a user opens a crafted file. The flaw, rooted in improper input validation (CWE-20), affects a broad range of Office versions across Windows and macOS including Microsoft 365 Apps for Enterprise, Office LTSC 2021/2024, and Office 2019. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the victim be running an unpatched version of Microsoft Office PowerPoint on Windows or macOS, and that a local user actively open a specially crafted PowerPoint file (UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The overall risk profile for this vulnerability is moderate. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious PowerPoint file engineered to trigger the improper input validation flaw during parsing and delivers it to a target via phishing email or a shared document link. When the victim opens the file on an unpatched Office installation, the parser fails to properly validate the malformed input, causing the application to read and expose sensitive local data - such as memory contents or file fragments - to the attacker. … |
| Remediation | Apply Microsoft's August 2026 security updates immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-20 – Improper Input Validation
View allSame technique Information Disclosure
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External POC / Exploit Code
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