Detections
Analytics
Security Updates for Microsoft Exchange Server (May 2026)
high Nessus Plugin ID 316010
Synopsis
The Microsoft Exchange Server installed on the remote host is affected by a spoofing 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 May, 2026 security bulletin.- Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network. (CVE-2026-42897)
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:-KB5011155
-KB5035606
-KB5042461
See Also
Plugin Details
Severity: High
ID: 316010
File Name: smb_nt_ms26_may_exchange.nasl
Version: 1.1
Type: Local
Agent: windows
Family: Windows : Microsoft Bulletins
Published: 5/21/2026
Updated: 5/21/2026
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.3
CVSS v2
Risk Factor: High
Base Score: 9.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N
CVSS Score Source: CVE-2026-42897
CVSS v3
Risk Factor: High
Base Score: 8.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Vulnerability Information
CPE: cpe:/a:microsoft:exchange_server:2016, cpe:/a:microsoft:exchange_server:2019
Required KB Items: SMB/MS_Bulletin_Checks/Possible
Patch Publication Date: 5/14/2026
Vulnerability Publication Date: 5/14/2026
Reference Information
CVE: CVE-2026-42897