Use After Free Vulnerability in Microsoft Excel
CVE-2026-32198

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft 365 Apps For Enterprise
Microsoft Excel 2016
Microsoft Office 2019
Microsoft Office Ltsc 2021
Vendor
CVE Published:
14 April 2026

What is CVE-2026-32198?

A vulnerability exists in Microsoft Excel that enables an unauthorized attacker to execute code locally due to a use after free condition. This flaw allows attackers to exploit the issue by manipulating memory after it has been freed, potentially leading to arbitrary code execution on the affected system. Users of Microsoft Excel should apply the necessary security patches to mitigate risks associated with this vulnerability. For further details, refer to the Microsoft security advisory.

Affected Version(s)

Microsoft 365 Apps for Enterprise 32-bit Systems 16.0.1

Microsoft Excel 2016 32-bit Systems 16.0.0.0 < 16.0.5548.1000

Microsoft Office 2019 32-bit Systems 19.0.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.