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.

Detections

Analytics

Security Updates for Microsoft Office Online Server (October 2026)

high Nessus Plugin ID 365474

Version 1.2

Version 1.1

Version 1.2 Oct 14, 2026, 9:52 AM CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:U/RL:OF/RC:C") CVSS temporal metrics ("CVSSv3 temporal vector" set to "CVSS:3.0/E:U/RL:O/RC:C") CVSSv2 score source (changed from "CVE-2026-100210" to "CVE-2026-97780") CVSSv3 score source (set to "CVE-2026-97778") Exploit attributes ("Exploit available" set to "False") Exploit attributes ("Exploitability ease" set to "No known exploits are available") Plugin Feed: 202610140952
Version 1.1 Oct 13, 2026, 11:46 PM New Plugin Feed: 202610132346