Detections
Analytics
Security Updates for Microsoft Office Products (May 2026)
high Nessus Plugin ID 314350
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Synopsis
The Microsoft Office Products are affected by multiple remote code execution vulnerabilities.Description
The Microsoft Office Products are missing a security update. They are, therefore, affected by multiple vulnerabilities:- Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
(CVE-2026-40358)
- Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally. (CVE-2026-40363)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Microsoft has released KB5002866 to address this issue.See Also
Plugin Details
Severity: High
ID: 314350
File Name: smb_nt_ms26_may_office.nasl
Version: 1.3
Type: Local
Agent: windows
Family: Windows : Microsoft Bulletins
Published: 5/12/2026
Updated: 5/15/2026
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
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-2026-40363
CVSS v3
Risk Factor: High
Base Score: 8.4
Temporal Score: 7.3
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/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
Required KB Items: SMB/MS_Bulletin_Checks/Possible
Exploit Ease: No known exploits are available
Patch Publication Date: 5/12/2026
Vulnerability Publication Date: 5/12/2026
Reference Information
CVE: CVE-2026-40358, CVE-2026-40363