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

PT - office_for_mac (smb_nt_ms26_may_office_for_mac.nasl)

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

  - Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
    (CVE-2026-40361, CVE-2026-40366)

  - Access of resource using incompatible type ('type confusion') in Microsoft Office Word allows an     unauthorized attacker to execute code locally. (CVE-2026-40364)

  - Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code     locally. (CVE-2026-40367)

  - Files or directories accessible to external parties in Microsoft Office Word allows an unauthorized     attacker to disclose information locally. (CVE-2026-35440)

  - External control of file name or path in Microsoft Office Word allows an unauthorized attacker to     disclose information over a network. (CVE-2026-40421)

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 may-12-2026 advisory.

  - Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code     locally. (CVE-2026-40367)

  - Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
    (CVE-2026-40359)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information     locally. (CVE-2026-40360)

  - Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code     locally. (CVE-2026-40362)

  - Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
    (CVE-2026-40358)

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

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

  - Access of resource using incompatible type ('type confusion') in Microsoft Office Word allows an     unauthorized attacker to execute code locally. (CVE-2026-40364)

  - Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
    (CVE-2026-40361, CVE-2026-40366)

  - Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute     code locally. (CVE-2026-40367)

  - Files or directories accessible to external parties in Microsoft Office Word allows an unauthorized     attacker to disclose information locally. (CVE-2026-35440)

  - External control of file name or path in Microsoft Office Word allows an unauthorized attacker to     disclose information over a network. (CVE-2026-40421)

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
314674	Security Updates for Microsoft Word Products C2R (May 2026)	Nessus	Windows	high
314356	Security Updates for Microsoft Office Products (May 2026) (macOS)	Nessus	MacOS X Local Security Checks	high
314343	Security Updates for Microsoft Word Products (May 2026)	Nessus	Windows : Microsoft Bulletins	high

Detections

Analytics

CVE-2026-40361

high

Tenable Plugins

Coming Soon

high

high

high