CVE-2026-118153: Microsoft Exchange Server Denial of Service Vulnerability
Published Nov 10, 2026
·Updated
Inefficient algorithmic complexity in Microsoft Exchange Server allows an unauthorized attacker to deny service over a network.
Other sources
Microsoft Exchange Server Denial of Service Vulnerability
— Microsoft
Affected Software
1 affected componentFixes available
Microsoft Exchange Server Subscription Edition RTM<15.02.2562.057
15.02.2562.057
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 15.02.2562.057Patch KB5133453
Event History
Nov 10, 2026
CVE Published
via Microsoft·04:00 PM
Data Sourced
via Microsoft·04:00 PM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·04:00 PM
Affected Software
CVE Published
via MITRE·06:21 PM
Data Sourced
via MITRE·06:21 PM
DescriptionSeverity
Data Sourced
via NVD·07:19 PM
DescriptionSeverityWeakness