Improper access control in Microsoft Exchange Server Subscription Edition RTM - CVE-2026-118208
Published: November 11, 2026
Vulnerability identifier: #VU165056
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-118208
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to perform spoofing over a network.
The vulnerability exists due to improper access control in Microsoft Exchange Server when handling network requests. A remote user can send crafted requests to bypass access restrictions and perform spoofing.
Affected software
Microsoft Exchange Server Subscription Edition RTM
How to mitigate CVE-2026-118208
Install security update from vendor's website.
Microsoft Exchange Server Subscription Edition RTM - update to 15.02.2562.057