Main Vulnerability Database Vulnerabilities #VU115119

Free of Memory not on the Heap in Microsoft products - CVE-2025-54899

Published: September 10, 2025

Vulnerability identifier: #VU115119

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-2025-54899

CWE-ID: CWE-590

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 free of memory not on the heap issue in Microsoft Excel. A remote attacker can create a specially crafted file, trick the victim into opening it and execute arbitrary code on the target system.

Affected software

Microsoft 365 Apps for Enterprise
Microsoft Excel
Microsoft Office
Microsoft Office LTSC

How to mitigate CVE-2025-54899

Install updates from vendor's website.

External References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-54899

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