CVE-2025-21383

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

Information Disclosure Microsoft Buffer Overflow 365 Apps Excel Office Office Long Term Servicing Channel

Description

Microsoft Excel Information Disclosure Vulnerability

Analysis

Microsoft Excel Information Disclosure Vulnerability. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. This Out-of-bounds Read vulnerability could allow attackers to read data from memory outside the intended buffer boundaries.

Technical Context

This vulnerability is classified as Out-of-bounds Read (CWE-125), which allows attackers to read data from memory outside the intended buffer boundaries. Affected products include: Microsoft 365 Apps, Microsoft Excel, Microsoft Office, Microsoft Office Long Term Servicing Channel.

Affected Products

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

Remediation

A vendor patch is available. Apply the latest security update as soon as possible. Validate array indices and buffer lengths. Use memory-safe languages. Enable AddressSanitizer during testing.

Priority Score

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

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CVE-2025-21383 vulnerability details – vuln.today
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