Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

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

  - Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a     network. (CVE-2026-69671, CVE-2026-69764, CVE-2026-72972, CVE-2026-72973, CVE-2026-78510, CVE-2026-78511,     CVE-2026-78517, CVE-2026-78521, CVE-2026-80085)

  - Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a     network. (CVE-2026-69686, CVE-2026-69722, CVE-2026-69759, CVE-2026-78504)

  - Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
    (CVE-2026-78507, CVE-2026-78514)

  - Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code over     a network. (CVE-2026-78509)

  - Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a     network. (CVE-2026-78502, CVE-2026-78503, CVE-2026-78522, CVE-2026-80079, CVE-2026-80088, CVE-2026-80090)

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:

  - External control of file name or path in Microsoft Office Word allows an unauthorized attacker to     execute code locally. (CVE-2026-62804)

  - Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code     over a network. (CVE-2026-69556, CVE-2026-69671, CVE-2026-69764, CVE-2026-72972, CVE-2026-72973,     CVE-2026-78511, CVE-2026-78517, CVE-2026-78521, CVE-2026-80085)

  - Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code     over a network. (CVE-2026-69686, CVE-2026-69722, CVE-2026-69759, CVE-2026-78504)

  - Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information     over a network. (CVE-2026-69719)

  - Out-of-bounds read in Microsoft Office Word allows an authorized attacker to disclose information     locally. (CVE-2026-72976)

  - Null pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code     over a network. (CVE-2026-77901)

  - Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information     over a network. (CVE-2026-77911, CVE-2026-78502, CVE-2026-78503, CVE-2026-78522, CVE-2026-80079,     CVE-2026-80090)

  - Improper null termination in Microsoft Office Word allows an unauthorized attacker to disclose     information locally. (CVE-2026-78506)

  - Heap-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute     code over a network. (CVE-2026-78509)

  - Use after free in Microsoft Office Word allows an unauthorized attacker to execute code over a     network. (CVE-2026-78514)

  - Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to execute code over     a network. (CVE-2026-78520)

  - Use after free in Microsoft Office Outlook allows an unauthorized attacker to execute code over a     network. (CVE-2026-78525)

  - Double free in Microsoft Office Word allows an unauthorized attacker to execute code over a network.
    (CVE-2026-80080)

  - Buffer over-read in Microsoft Office Word allows an unauthorized attacker to disclose information     locally. (CVE-2026-83949, CVE-2026-83951)

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
344562	Security Updates for Microsoft Word Products C2R (September 2026)	Nessus	Windows	Local	critical
344290	Security Updates for Microsoft Word Products (September 2026)	Nessus	Windows : Microsoft Bulletins	Local	critical

Detections

Analytics

CVE-2026-72972

high

Tenable Plugins

critical

critical