Use-after-free in Microsoft products - CVE-2026-32199
Published: April 16, 2026
Vulnerability identifier: #VU126259
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-2026-32199
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Office Online Server
Microsoft Office
Microsoft Excel
Microsoft 365 Apps for Enterprise
Microsoft Office LTSC
Office Online Server
Microsoft Office
Microsoft Excel
Microsoft 365 Apps for Enterprise
Microsoft Office LTSC
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in Microsoft Excel. A remote attacker can trick a victim to open a specially crafted file and execute arbitrary cde on the target system.
How to mitigate CVE-2026-32199
Install updates from vendor's website.