Deserialization of Untrusted Data in Microsoft Office LTSC and Microsoft 365 Apps for Enterprise - CVE-2025-21364
Published: January 15, 2025
Vulnerability identifier: #VU102799
CSH Severity: High
CVSS v4.0: 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/E:U/U:Amber
CVE-ID: CVE-2025-21364
CWE-ID: CWE-502
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Microsoft Office LTSC
Microsoft 365 Apps for Enterprise
Microsoft Office LTSC
Microsoft 365 Apps for Enterprise
Detailed vulnerability description
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.
How to mitigate CVE-2025-21364
Install updates from vendor's website.