CVE-2025-21364

HIGH

Microsoft 365 Apps - Security Feature Bypass via Excel Deserialization

Title source: llm

Microsoft Excel Security Feature Bypass Vulnerability

Core 1

Core References

Patch, Vendor Advisory vendor-advisory patch

CVSS v3 7.8

EPSS 0.0024

EPSS Percentile 47.5%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

CWE

CWE-502

Status published

Products (2)

microsoft/365_apps (2 CPE variants)

microsoft/office_long_term_servicing_channel 2024 (2 CPE variants)

Published Jan 14, 2025

Tracked Since Feb 18, 2026