PT-2025-1239 · Microsoft · Office+2

Published 2025-01-14 · Updated 2025-07-01 · CVE-2025-21364

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)

Description The issue is related to a security feature bypass in Microsoft Excel, which can be exploited to circumvent existing security restrictions. This is due to deficiencies in the deserialization mechanism of Microsoft Office and Microsoft 365 Apps for Enterprise packages.

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

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

BDU:2025-00631

CVE-2025-21364

Affected Products

365 Apps For Enterprise

Office Excel

Office

References · 7

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21364 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-00631 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-21364 · Security Note
• https://osv.dev/vulnerability/CVE-2025-21364 · Vendor Advisory
• https://twitter.com/CVEnew/status/1879490192589173241 · Twitter Post
• https://t.me/cvenotify/127271 · Telegram Post
• https://t.me/cvedetector/15329 · Telegram Post