EUVD-2026-56581
GHSA-24c6-hjh6-qgjx
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
File must be opened locally (AV:L), no system privileges needed (PR:N), user must open the file (UI:R), only confidentiality impacted (C:H/I:N/A:N).
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 PowerPoint stems from improper input validation (CWE-20) when processing specially crafted presentation files, affecting a broad range of Office product lines on both Windows and macOS. The CVSS vector (AV:L/UI:R/C:H) confirms that while no special system privileges are required, a victim must open a malicious file, making social engineering the primary delivery mechanism. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The CVSS vector (AV:L/AC:L/PR:N/UI:R) confirms the following specific conditions: the attack must occur locally - meaning the malicious PowerPoint file must be opened on the victim's machine, not triggered remotely over a network connection. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS score of 5.5 (Medium) is supported by a local attack vector, low complexity, and high confidentiality impact with no integrity or availability exposure. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious PowerPoint file embedding input specifically designed to bypass validation logic and trigger memory or file disclosure, then delivers it to a target user via a phishing email or a compromised shared drive. The victim opens the file in an unpatched version of PowerPoint, causing the application to expose sensitive information - such as file system paths, memory contents, or credential fragments - which the attacker may capture through a secondary channel embedded in the file (e.g., a remote template reference or OLE link). … |
| Remediation | Apply the vendor-released patch immediately via Microsoft Update or the Microsoft Update Catalog. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
Microsoft Outlook Remote Code Execution Vulnerability. Rated critical severity (CVSS 9.8), this vulnerability is remotel
Microsoft Excel Security Feature Bypass Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is no authenti
Microsoft Publisher Security Feature Bypass Vulnerability. Rated high severity (CVSS 7.3), this vulnerability is low att
Microsoft Office contains a security feature bypass (CVE-2026-21509, CVSS 7.8) where reliance on untrusted inputs in sec
Microsoft Office Word contains a security decision bypass (CVE-2026-21514, CVSS 7.8) through reliance on untrusted input
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability. Rated high severity (CVSS 7.8), this vu
Microsoft Office Remote Code Execution Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is no authentic
Microsoft Excel Remote Code Execution Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is no authentica
Use-after-free vulnerability in Microsoft Office Word that allows local, unauthenticated attackers to execute arbitrary
Microsoft Excel Remote Code Execution Vulnerability. Rated high severity (CVSS 8.8), this vulnerability is remotely expl
Microsoft Office Elevation of Privilege Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is low attack
A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle obje
Same weakness CWE-20 – Improper Input Validation
View allSame technique Information Disclosure
View allShare
External POC / Exploit Code
Leaving vuln.today