CVE-2025-21390

HIGH

Microsoft 365 Apps < 16.0.10416.20058 - Heap Buffer Overflow

Title source: rule
STIX 2.1

Description

Microsoft Excel Remote Code Execution Vulnerability

References (1)

Core 1
Core References
Patch, Vendor Advisory vendor-advisory patch
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21390

Scores

CVSS v3 7.8
EPSS 0.0035
EPSS Percentile 57.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-122
Status published
Products (6)
microsoft/365_apps (2 CPE variants)
microsoft/excel 2016 (2 CPE variants)
microsoft/office 2019 (2 CPE variants)
microsoft/office_long_term_servicing_channel 2021 (3 CPE variants)
microsoft/office_long_term_servicing_channel 2024 (3 CPE variants)
microsoft/office_online_server < 16.0.10416.20058
Published Feb 11, 2025
Tracked Since Feb 18, 2026