Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code locally.

The Microsoft PowerPoint Products are missing security updates. It is, therefore, affected by multiple vulnerabilities:

  - Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code     locally. (CVE-2026-55043, CVE-2026-55120, CVE-2026-55123)

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

The version of Microsoft Office for Mac installed on the remote host is affected by multiple vulnerabilities as referenced in the july-14-2026 advisory.

  - Out-of-bounds read in Microsoft Office allows an unauthorized attacker to execute code locally.
    (CVE-2026-55045)

  - Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code     locally. (CVE-2026-55141, CVE-2026-55899)

  - Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
    (CVE-2026-47642, CVE-2026-54131, CVE-2026-55948)

  - Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to disclose     information locally. (CVE-2026-48580, CVE-2026-55138)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information     locally. (CVE-2026-50408, CVE-2026-54988, CVE-2026-55046, CVE-2026-55122, CVE-2026-55898)

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

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

  - Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to     execute code locally. (CVE-2026-55043, CVE-2026-55120, CVE-2026-55123)

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
327594	Security Updates for Microsoft PowerPoint Products C2R (July 2026)	Nessus	Windows	Local	high
326952	Security Updates for Microsoft Office Products (July 2026) (macOS)	Nessus	MacOS X Local Security Checks	Local	high
326862	Security Updates for Microsoft PowerPoint Products (July 2026)	Nessus	Windows : Microsoft Bulletins	Local	high

Detections

Analytics

CVE-2026-55043

high

Tenable Plugins

high

high

high