Detections
Analytics
Security Updates for Microsoft Word Products (February 2026)
high Nessus Plugin ID 298560
Synopsis
The Microsoft Word Products are affected by multiple vulnerabilities.Description
The Microsoft Word Products are missing a security update. They are, therefore, affected by multiple spoofing vulnerabilities:- Deserialization of untrusted data in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network. (CVE-2026-21511)
- A spoofing vulnerability in Microsoft Office Word allows an unauthorized attacker to perform spoofing over a network. (CVE-2026-21260)
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 KB5002839 to address this issue.See Also
Plugin Details
Severity: High
ID: 298560
File Name: smb_nt_ms26_feb_word.nasl
Version: 1.2
Type: local
Agent: windows
Family: Windows : Microsoft Bulletins
Published: 2/10/2026
Updated: 2/11/2026
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 5.8
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N
CVSS Score Source: CVE-2026-21511
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:microsoft:word
Required KB Items: SMB/MS_Bulletin_Checks/Possible
Exploit Ease: No known exploits are available
Patch Publication Date: 2/10/2026
Vulnerability Publication Date: 2/10/2026
Reference Information
CVE: CVE-2026-21260, CVE-2026-21511