Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

The version of Microsoft Office for Mac installed on the remote host is affected by multiple vulnerabilities as referenced in the april-15-2025 advisory.

  - Improper input validation in Microsoft Office Word allows an unauthorized attacker to bypass a security     feature over a network. (CVE-2025-29816)

  - Incomplete list of disallowed inputs in Microsoft Office OneNote allows an unauthorized attacker to bypass     a security feature locally. (CVE-2025-29822)

  - Out-of-bounds read in Microsoft Office allows an unauthorized attacker to execute code locally.
    (CVE-2025-26642)

  - Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
    (CVE-2025-27750, CVE-2025-27751)

  - Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
    (CVE-2025-27747, CVE-2025-29820)

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 security updates. It is, therefore, affected by multiple vulnerabilities:
  - A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute     unauthorized arbitrary commands. (CVE-2025-26642, CVE-2025-27750, CVE-2025-27751, CVE-2025-29823)

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 installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:
  - A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute     unauthorized arbitrary commands. (CVE-2025-26642, CVE-2025-27746, CVE-2025-27751)

The Microsoft Excel Products are missing a security update. They are, therefore, affected by multiple remote code execution vulnerabilities. An attacker can exploit these to bypass authentication and execute unauthorized arbitrary commands.

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	Type	Severity
234490	Security Updates for Microsoft Office Products (April 2025) (macOS)	Nessus	MacOS X Local Security Checks	Local	high
234233	Security Updates for Microsoft Excel Products C2R (April 2025)	Nessus	Windows	Local	high
234040	Security Updates for Microsoft Office Online Server (April 2025)	Nessus	Windows : Microsoft Bulletins	Local	high
234032	Security Updates for Microsoft Excel Products (April 2025)	Nessus	Windows : Microsoft Bulletins	Local	high

Detections

Analytics

CVE-2025-27751

high

Tenable Plugins

high

high

high

high