リモートホストのMicrosoft Office Online ServerまたはOffice Web Appsインストールにセキュリティ更新プログラムがありません。そのため、以下の複数の脆弱性の影響を受けます。

  - Microsoft Office Excel のヒープベースのバッファオーバーフローにより、権限のない攻撃者がネットワーク上でコードを実行することが可能です。(CVE-2026-100210、 CVE-2026-97003、 CVE-2026-97004、 CVE-2026-97007、 CVE-2026-97748、 CVE-2026-97751、 CVE-2026-97753、 CVE-2026-97754、 CVE-2026-97756、 CVE-2026-97757、 CVE-2026-97758、 CVE-2026-97763、 CVE-2026-97765、 CVE-2026-97766、 CVE-2026-97768、 CVE-2026-97769、 CVE-2026-97773、 CVE-2026-97776、 CVE-2026-97777、 CVE-2026-97780)

  - Microsoft Office の Excel の use-after-free は、権限のない攻撃者がネットワーク上でコードを実行することを可能にします。
    (CVE-2026-100212, CVE-2026-97010, CVE-2026-97017, CVE-2026-97738, CVE-2026-97747, CVE-2026-97752, CVE-2026-97771, CVE-2026-97775)

  - Microsoft Office Excel の領域外読み取り機能により、権限のない攻撃者がネットワーク上でコードを実行することが可能です。(CVE-2026-105718、 CVE-2026-97755)

Nessus はこれらの問題をテストしておらず、代わりにアプリケーションが自己報告するバージョン番号にのみ依存していることに注意してください。

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

  - Use after free in Microsoft Office PowerPoint allows an unauthorized attacker to execute code over a     network. (CVE-2026-70215, CVE-2026-88144, CVE-2026-88178)

  - Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over     a network. (CVE-2026-100210, CVE-2026-77902, CVE-2026-88145, CVE-2026-97003, CVE-2026-97004,     CVE-2026-97007, CVE-2026-97741, CVE-2026-97748, CVE-2026-97751, CVE-2026-97753, CVE-2026-97754,     CVE-2026-97756, CVE-2026-97757, CVE-2026-97758, CVE-2026-97763, CVE-2026-97765, CVE-2026-97766,     CVE-2026-97768, CVE-2026-97769, CVE-2026-97773, CVE-2026-97776, CVE-2026-97777, CVE-2026-97780)

  - Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
    (CVE-2026-100209, CVE-2026-100211, CVE-2026-100212, CVE-2026-97010, CVE-2026-97017, CVE-2026-97738,     CVE-2026-97745, CVE-2026-97747, CVE-2026-97752, CVE-2026-97759, CVE-2026-97771, CVE-2026-97775)

  - Heap-based buffer overflow in Microsoft Office OneNote allows an unauthorized attacker to execute code     over a network. (CVE-2026-102858)

  - Heap-based buffer overflow in Microsoft Office PowerPoint allows an unauthorized attacker to execute code     over a network. (CVE-2026-105599, CVE-2026-88207)

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:

  - Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a     network. (CVE-2026-97003, CVE-2026-97004, CVE-2026-97007, CVE-2026-97741, CVE-2026-97748,     CVE-2026-97751, CVE-2026-97753, CVE-2026-97754, CVE-2026-97756, CVE-2026-97757, CVE-2026-97758,     CVE-2026-97763, CVE-2026-97765, CVE-2026-97766, CVE-2026-97768, CVE-2026-97769, CVE-2026-97773,     CVE-2026-97776, CVE-2026-97777, CVE-2026-97780, CVE-2026-100210)

  - Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over     a network. (CVE-2026-97742, CVE-2026-97750, CVE-2026-97761, CVE-2026-97770)

  - Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
    (CVE-2026-97010, CVE-2026-97017, CVE-2026-97738, CVE-2026-97745, CVE-2026-97747, CVE-2026-97752,     CVE-2026-97759, CVE-2026-97771, CVE-2026-97775, CVE-2026-100209, CVE-2026-100211, CVE-2026-100212)

  - Double free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
    (CVE-2026-97767, CVE-2026-97772)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a     network. (CVE-2026-97755, CVE-2026-105718)

  - Out-of-bounds write in Microsoft Office Excel allows an unauthorized attacker to execute code over a     network. (CVE-2026-97762)

  - Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute     code over a network. (CVE-2026-97739, CVE-2026-97746)

  - Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code     over a network. (CVE-2026-97778)

  - Buffer underwrite ('buffer underflow') in Microsoft Office Excel allows an unauthorized attacker to execute     code over a network. (CVE-2026-97008)

  - Use of uninitialized resource in Microsoft Office Excel allows an unauthorized attacker to execute code     over a network. (CVE-2026-97011)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a     network. (CVE-2026-97760, CVE-2026-97779)

  - Use after free in Microsoft Office Excel allows an unauthorized attacker to disclose information over a     network. (CVE-2026-97743)

  - Exposure of sensitive system information to an unauthorized control sphere in Microsoft Office Excel allows     an unauthorized attacker to disclose information over a network. (CVE-2026-97740)

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 or Office Web Apps installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:

  - Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over     a network. (CVE-2026-100210, CVE-2026-97003, CVE-2026-97004, CVE-2026-97007, CVE-2026-97748,     CVE-2026-97751, CVE-2026-97753, CVE-2026-97754, CVE-2026-97756, CVE-2026-97757, CVE-2026-97758,     CVE-2026-97763, CVE-2026-97765, CVE-2026-97766, CVE-2026-97768, CVE-2026-97769, CVE-2026-97773,     CVE-2026-97776, CVE-2026-97777, CVE-2026-97780)

  - Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
    (CVE-2026-100212, CVE-2026-97010, CVE-2026-97017, CVE-2026-97738, CVE-2026-97747, CVE-2026-97752,     CVE-2026-97771, CVE-2026-97775)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a     network. (CVE-2026-105718, CVE-2026-97755)

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

ID	名前	製品	ファミリー	公開日	更新日	深刻度
365474	Microsoft Office Online Server のセキュリティ更新プログラム (2026 年 10 月)	Nessus	Windows : Microsoft Bulletins	2026/10/13	2026/10/15	high
365982	Security Updates for Microsoft Office Products (October 2026) (macOS)	Nessus	MacOS X Local Security Checks	2026/10/14	2026/10/14	critical
365621	Security Updates for Microsoft Excel Products C2R (October 2026)	Nessus	Windows	2026/10/14	2026/10/15	high
365474	Security Updates for Microsoft Office Online Server (October 2026)	Nessus	Windows : Microsoft Bulletins	2026/10/13	2026/10/15	high

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