CVE-2025-21390

HIGH
2025-02-11 [email protected]
7.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 28, 2026 - 18:26 vuln.today
Patch Released
Mar 28, 2026 - 18:26 nvd
Patch available
CVE Published
Feb 11, 2025 - 18:15 nvd
HIGH 7.8

Tags

Microsoft Buffer Overflow Heap Overflow RCE 365 Apps Excel Office Office Long Term Servicing Channel Office Online Server

Description

Microsoft Excel Remote Code Execution Vulnerability

Analysis

Microsoft Excel Remote Code Execution Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity.

Technical Context

This vulnerability is classified under CWE-122. Affected products include: Microsoft 365 Apps, Microsoft Excel, Microsoft Office, Microsoft Office Long Term Servicing Channel, Microsoft Office Online Server.

Affected Products

Microsoft 365 Apps, Microsoft Excel, Microsoft Office, Microsoft Office Long Term Servicing Channel, Microsoft Office Online Server.

Remediation

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Priority Score

39
Low Medium High Critical
KEV: 0
EPSS: +0.3
CVSS: +39
POC: 0

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CVE-2025-21390 vulnerability details – vuln.today
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