Main Vulnerability Database Vulnerabilities #VU102799

Deserialization of Untrusted Data in Microsoft 365 Apps for Enterprise and Microsoft Office LTSC - CVE-2025-21364

Published: January 15, 2025

Vulnerability identifier: #VU102799

CSH Severity: High

CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-21364

CWE-ID: CWE-502

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data in Microsoft Excel. A remote attacker can trick a victim to open a specially crafted file and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Affected software

Microsoft 365 Apps for Enterprise
Microsoft Office LTSC

How to mitigate CVE-2025-21364

Install updates from vendor's website.

External References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21364

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