EUVD-2026-56579
GHSA-gwm7-j573-x6m8
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Local file-open trigger with user interaction required; no attacker privileges needed; impact is confidentiality-only with no integrity or availability effect.
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
Information disclosure in Microsoft Office PowerPoint stems from improper input validation (CWE-20) that allows a locally-present attacker to read sensitive data from the vulnerable system when a user opens a crafted file. Affected products span PowerPoint across Office 2019, LTSC 2021, LTSC 2024, and Microsoft 365 Apps for Enterprise on both Windows and macOS. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that (1) the target system runs an unpatched version of Microsoft Office PowerPoint across the affected Windows or macOS release trains, and (2) a local user actively opens a specially crafted PowerPoint file - the attack cannot be triggered remotely without user interaction. … 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 meaningful but constrained threat profile. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious PowerPoint file that triggers improper input validation during parsing and delivers it to a target via email, file share, or social engineering. When the victim opens the file in an unpatched version of PowerPoint, the parser processes the malformed input and discloses sensitive information - potentially memory contents, file system paths, or local file data - to the attacker. … |
| Remediation | Apply the Microsoft-released security update for your Office version. … 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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