Detections
Analytics
Security Updates for Microsoft Exchange Server (August 2026)
high Nessus Plugin ID 334612
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 security updates. It is, therefore, affected by multiple vulnerabilities:- Improper control of resource identifiers ('resource injection') in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network. (CVE-2026-62910)
- Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network. (CVE-2026-62911)
- Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a network. (CVE-2026-62913)
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:-KB5121573
-KB5121574
-KB5121575
-KB5121576
See Also
https://support.microsoft.com/help/5121573
https://support.microsoft.com/help/5121574
Plugin Details
Severity: High
ID: 334612
File Name: smb_nt_ms26_aug_exchange.nasl
Version: 1.1
Type: Local
Agent: windows
Family: Windows : Microsoft Bulletins
Published: 8/11/2026
Updated: 8/11/2026
Supported Sensors: Nessus Agent, Nessus
Risk Information
CVSS v2
Risk Factor: High
Base Score: 8.3
Vector: CVSS2#AV:N/AC:L/Au:M/C:C/I:C/A:C
CVSS Score Source: CVE-2026-62913
CVSS v3
Risk Factor: High
Base Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vulnerability Information
CPE: cpe:/a:microsoft:exchange_server:2016, cpe:/a:microsoft:exchange_server:subscription_edition
Required KB Items: SMB/MS_Bulletin_Checks/Possible
Patch Publication Date: 8/11/2026
Vulnerability Publication Date: 8/11/2026
Reference Information
CVE: CVE-2026-62910, CVE-2026-62911, CVE-2026-62912, CVE-2026-62913, CVE-2026-62914, CVE-2026-62915, CVE-2026-65813