Detections
Analytics
Security Updates for Microsoft Exchange Server (June 2026)
high Nessus Plugin ID 320863
Language:
Synopsis
The Microsoft Exchange Server installed on the remote host is affected by multiple vulnerabilities.Description
The Microsoft Exchange Server installed on the remote host is missing a security update. It is, therefore, affected by multiple vulnerabilities as referenced in the June, 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-2026-45500, CVE-2026-45501, CVE-2026-47631)
- Improper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network. (CVE-2026-48579)
- Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network. (CVE-2026-45583)
- Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to disclose information over a network. (CVE-2026-45502, CVE-2026-45503)
- Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network. (CVE-2026-45504)
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 the following security updates to address this issue:-KB5094139
-KB5094140
-KB5094142
-KB5094144
See Also
http://www.nessus.org/u?3b89f8a8
http://www.nessus.org/u?496cae11
Plugin Details
Severity: High
ID: 320863
File Name: smb_nt_ms26_jun_exchange.nasl
Version: 1.4
Type: Local
Agent: windows
Family: Windows : Microsoft Bulletins
Published: 6/12/2026
Updated: 6/22/2026
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.9
Percentile: 96.92
CVSS v2
Risk Factor: High
Base Score: 9
Temporal Score: 7.4
Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS Score Source: CVE-2026-45504
CVSS v3
Risk Factor: High
Base Score: 8.1
Temporal Score: 7.5
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C
CVSS Score Source: CVE-2026-45583
Vulnerability Information
CPE: cpe:/a:microsoft:exchange_server:subscription_edition, cpe:/a:microsoft:exchange_server:2016, cpe:/a:microsoft:exchange_server:2019
Required KB Items: SMB/MS_Bulletin_Checks/Possible
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 6/9/2026
Vulnerability Publication Date: 6/4/2026
CISA Known Exploited Vulnerability Due Dates: 5/29/2026
Reference Information
CVE: CVE-2026-42897, CVE-2026-45500, CVE-2026-45501, CVE-2026-45502, CVE-2026-45503, CVE-2026-45504, CVE-2026-45583, CVE-2026-47631, CVE-2026-48579