Detections
Analytics
Security Updates for Microsoft Office Online Server (December 2025)
high Nessus Plugin ID 277992
Language:
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 the following vulnerabilities:- Untrusted pointer dereference in Microsoft Office Excel allows an unauthorized attacker to execute code locally. (CVE-2025-62556,CVE-2025-62560,CVE-2025-62561)
- Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
(CVE-2025-62563)
- Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
(CVE-2025-62564)
Solution
Microsoft has released 5002817 to address this issue.See Also
Plugin Details
Severity: High
ID: 277992
File Name: smb_nt_ms25_dec_office_web.nasl
Version: 1.3
Type: local
Agent: windows
Family: Windows : Microsoft Bulletins
Published: 12/9/2025
Updated: 2/26/2026
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.9
CVSS v2
Risk Factor: High
Base Score: 7.2
Temporal Score: 5.3
Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2025-62564
CVSS v3
Risk Factor: High
Base Score: 7.8
Temporal Score: 6.8
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:microsoft:office_online_server, cpe:/a:microsoft:office_web_apps
Required KB Items: SMB/MS_Bulletin_Checks/Possible
Exploit Ease: No known exploits are available
Patch Publication Date: 12/9/2025
Vulnerability Publication Date: 12/9/2025
Reference Information
CVE: CVE-2025-62556, CVE-2025-62560, CVE-2025-62561, CVE-2025-62563, CVE-2025-62564