Microsoft Exchange Server Denial of Service Vulnerability
Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely CVE-2026-118153 · score 7.5/10
What could go wrong?
An attacker could make a program or service crash or stop responding.
How urgent is it?
Check Microsoft’s page for details.
Who is affected?
Microsoft Exchange Server Subscription Edition RTM
What should I do?
Install this month’s updates via Windows Update, Intune or your update tool, then restart.
Known problems
Microsoft lists known issues per update: KB5133453. Official page.