Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.

microsoft_office_for_mac april-14-2026: April 14, 2026

The Microsoft Excel Products are missing a security update. It is, therefore, affected by the following vulnerabilities:

  - Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
    (CVE-2026-32189, CVE-2026-32197, CVE-2026-32198, CVE-2026-32199)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information     locally. (CVE-2026-32188)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Microsoft Excel Products are missing a security update. They are, therefore, affected by multiple vulnerabilities:

  - Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
    (CVE-2026-32189, CVE-2026-32197, CVE-2026-32198, CVE-2026-32199)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information     locally. (CVE-2026-32188)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Microsoft Office Online Server or Office Web Apps installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:

  - Remote Code Execution vulnerabilities (CVE-2026-32189, CVE-2026-32197, CVE-2026-32198, CVE-2026-32199)

  - Information Disclosure vulnerability in Microsoft Excel 2016 (64-bit edition) (CVE-2026-32188)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
306441	Security Updates for Microsoft Excel Products C2R (April 2026)	Nessus	Windows	high
306440	Security Updates for Microsoft Excel Products (April 2026)	Nessus	Windows : Microsoft Bulletins	high
306432	Microsoft Office Online Server (April 2026)	Nessus	Windows : Microsoft Bulletins	high

Detections

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CVE-2026-32188

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