MICROSOFT EXCHANGE SERVER · CVE-2026-118153 · Infrastructure
NO FIX YET
Microsoft Exchange Server has an inefficient algorithm that an unauthorized attacker can trigger over the network. The result is a denial of service, taking the mail server offline or degrading it.
first public Nov 10, 2026 · 1 source
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Organizations running on-premises Microsoft Exchange Server that accept network traffic from untrusted sources. The sources do not list affected versions or the specific feature involved, so the exposure scope is unknown.
Not affected if exchange-online
Who cares exchange-server, self-hosted, windows
Unknown from the sources. In the analyst’s queue.
No fix yet, per the sources.
Inefficient algorithmic complexity in Microsoft Exchange Server allows an unauthorized attacker to deny service over a network.
This page as .md · .json · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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