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

  - Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an     unauthorized attacker to execute code over a network. (CVE-2026-65807)

  - Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code     locally. (CVE-2026-68794, CVE-2026-68796, CVE-2026-68798, CVE-2026-68800, CVE-2026-68801, CVE-2026-68805,     CVE-2026-68807, CVE-2026-68812, CVE-2026-68815)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a     network. (CVE-2026-70327, CVE-2026-70328)

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 august-11-2026 advisory.

  - Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
    (CVE-2026-70311)

  - Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an     unauthorized attacker to execute code over a network. (CVE-2026-65807)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
    (CVE-2026-68793, CVE-2026-68814)

  - Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code     locally. (CVE-2026-68794, CVE-2026-68796, CVE-2026-68798, CVE-2026-68800, CVE-2026-68801, CVE-2026-68805,     CVE-2026-68807, CVE-2026-68812, CVE-2026-68815)

  - Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code     locally. (CVE-2026-68795, CVE-2026-68816, CVE-2026-68817)

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	Published	Updated	Severity
335114	Security Updates for Microsoft Excel Products C2R (August 2026)	Nessus	Windows	8/13/2026	9/1/2026	high
334691	Security Updates for Microsoft Office Products (August 2026) (macOS)	Nessus	MacOS X Local Security Checks	8/12/2026	8/17/2026	medium

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