Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to disclose information over a network.

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 Office Products are missing security updates. It is, therefore, affected by multiple vulnerabilities:

  - Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code over a     network. (CVE-2026-88196, CVE-2026-88197)

  - Heap-based buffer overflow in Windows Rich Text Edit Control allows an unauthorized attacker to execute     code over a network. (CVE-2026-70096)

  - Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code over     a network. (CVE-2026-70300)

  - Stack-based buffer overflow in Microsoft Office Outlook allows an unauthorized attacker to execute code     over a network. (CVE-2026-88156)

  - Heap-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code over a     network. (CVE-2026-70269, CVE-2026-88185)

  - Integer overflow or wraparound in Microsoft Office Word allows an unauthorized attacker to execute code     over a network. (CVE-2026-105715)

  - Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code over a     network. (CVE-2026-77902, CVE-2026-88145)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code over a     network. (CVE-2026-70254)

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

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

  - 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 Word allows an unauthorized attacker to execute code     locally. (CVE-2026-96996, CVE-2026-97001)

  - Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code     locally. (CVE-2026-97009)

  - Use after free in Microsoft Office Click-To-Run allows an authorized attacker to elevate privileges     locally. (CVE-2026-70276, CVE-2026-85340)

  - Out-of-bounds read in Microsoft Office Outlook allows an unauthorized attacker to disclose information over     a network. (CVE-2026-70281)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a     network. (CVE-2026-70219, CVE-2026-88151, CVE-2026-88153, CVE-2026-88154, CVE-2026-88172,     CVE-2026-88175, CVE-2026-88184, CVE-2026-88190, CVE-2026-88192)

  - Buffer over-read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a     network. (CVE-2026-88195, CVE-2026-88201)

  - Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information over a     network. (CVE-2026-88169, CVE-2026-102867)

  - Out-of-bounds read in Microsoft Office PowerPoint allows an unauthorized attacker to disclose information     over a network. (CVE-2026-88183)

  - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information     locally. (CVE-2026-70214, CVE-2026-97014)

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
365982	Security Updates for Microsoft Office Products (October 2026) (macOS)	Nessus	MacOS X Local Security Checks	Local	critical
365620	Security Updates for Microsoft Office Products C2R (October 2026)	Nessus	Windows	Local	critical

Detections

Analytics

CVE-2026-70281

high

Tenable Plugins

critical

critical