PT-2025-6325 · Microsoft · Office+2

Published 2025-02-11 · Updated 2025-02-25 · CVE-2025-21387

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Microsoft Excel (affected versions not specified) Microsoft Office (affected versions not specified) Microsoft 365 Apps (affected versions not specified) Microsoft Office Online Server (affected versions not specified)

Description The issue allows remote attackers to execute arbitrary code and affect the system. It is related to the use of memory after it has been freed, which can be exploited to execute arbitrary code. This issue has been actively exploited.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2025-01550

CVE-2025-21387

Affected Products

365 Apps For Enterprise

Office Excel

Office

References · 18

• https://nvd.nist.gov/vuln/detail/CVE-2025-21387 · Security Note
• https://bdu.fstec.ru/vul/2025-01550 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21387 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-21387 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/718192 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-21387 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-21387 · Vendor Advisory
• https://twitter.com/transilienceai/status/1890912459629670609 · Twitter Post
• https://twitter.com/transilienceai/status/1892364832260694430 · Twitter Post
• https://twitter.com/transilienceai/status/1894365586928668745 · Twitter Post
• https://twitter.com/transilienceai/status/1891097625010594143 · Twitter Post
• https://twitter.com/transilienceai/status/1892006563864306080 · Twitter Post
• https://t.me/avleonovcom/1508 · Telegram Post
• https://twitter.com/transilienceai/status/1890197388062535886 · Twitter Post
• https://twitter.com/transilienceai/status/1890556686919770288 · Twitter Post