CVE-2025-54899 — Free of Memory not on the Heap in Microsoft 365 Apps FOR Enterprise

CWE-590 — Free of Memory not on the Heap4 documents4 sources
Severity
7.8HIGHNVD
EPSS
0.1%
top 73.62%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
10
Microsoft 365 Apps FOR EnterpriseMicrosoft Excel 2016Microsoft Office 2019+7 more
Timeline
PublishedSep 9

Description

Free of memory not on the heap in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages10 packages

▶CVEListV5microsoft/microsoft_excel_201616.0.0.0 — 16.0.5517.1000
▶CVEListV5microsoft/microsoft_office_201919.0.0 — https://aka.ms/OfficeSecurityReleases
▶CVEListV5microsoft/microsoft_office_ltsc_202116.0.1 — https://aka.ms/OfficeSecurityReleases
▶CVEListV5microsoft/microsoft_office_ltsc_202416.0.0 — https://aka.ms/OfficeSecurityReleases
▶CVEListV5microsoft/microsoft_office_ltsc_for_mac_202116.0.1 — 16.101.25091314

🔴Vulnerability Details

2
CVEList
Microsoft Excel Remote Code Execution Vulnerability↗2025-09-09
▶
GHSA
GHSA-2648-39fc-pr84: Free of memory not on the heap in Microsoft Office Excel allows an unauthorized attacker to execute code locally↗2025-09-09
▶

📋Vendor Advisories

1
Microsoft
Microsoft Excel Remote Code Execution Vulnerability↗2025-09-09
▶
CVE-2025-54899 — Free of Memory not on the Heap | cvebase