Detections
Analytics

Security Updates for Microsoft Office Online Server (October 2025)

high Nessus Plugin ID 270376

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Synopsis

The Microsoft Office Online Server installation on the remote host is affected by multiple vulnerabilities.

Description

The Microsoft Office Online Server installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities.

 - Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
 (CVE-2025-59223, CVE-2025-59224, CVE-2025-59225, CVE-2025-59236)

 - Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to execute code locally. (CVE-2025-59231, CVE-2025-59233)

 - Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally. (CVE-2025-59232, CVE-2025-59235)

Solution

Microsoft has released 5002797 to address this issue.

See Also

https://support.microsoft.com/en-us/help/5002797

Plugin Details

Severity: High

ID: 270376

File Name: smb_nt_ms25_oct_office_online.nasl

Version: 1.1

Type: local

Agent: windows

Published: 10/14/2025

Updated: 10/14/2025

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v3

Risk Factor: High

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: cpe:/a:microsoft:office_web_apps, cpe:/a:microsoft:office_online_server

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Patch Publication Date: 10/14/2025

Vulnerability Publication Date: 10/14/2025

Reference Information

CVE: CVE-2025-59223, CVE-2025-59224, CVE-2025-59225, CVE-2025-59231, CVE-2025-59232, CVE-2025-59233, CVE-2025-59235, CVE-2025-59236

MSFT: MS25-5002797

MSKB: 5002797