Detections
Analytics
Security Updates for Microsoft Exchange Server (February 2026)
medium Nessus Plugin ID 298557
Synopsis
The Microsoft Exchange Server installed on the remote host is affected by a vulnerability.Description
The Microsoft Exchange Server installed on the remote host is missing a security update. It is, therefore, affected by a vulnerability as referenced in the February, 2026 security bulletin.- User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network. (CVE-2026-21527)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Microsoft has released the following security updates to address this issue:-KB5074993
-KB5074994
-KB5074995
See Also
https://support.microsoft.com/help/5074993
Plugin Details
Severity: Medium
ID: 298557
File Name: smb_nt_ms26_feb_exchange.nasl
Version: 1.1
Type: local
Agent: windows
Family: Windows : Microsoft Bulletins
Published: 2/10/2026
Updated: 2/10/2026
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 2.5
CVSS v2
Risk Factor: Medium
Base Score: 6.4
Temporal Score: 4.7
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N
CVSS Score Source: CVE-2026-21527
CVSS v3
Risk Factor: Medium
Base Score: 6.5
Temporal Score: 5.7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:microsoft:exchange_server:2016, cpe:/a:microsoft:exchange_server:2019
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-2026-21527