MICROSOFT EXCHANGE SERVER · CVE-2026-118149 · Runtime
NO FIX YET
A code injection flaw in Microsoft Exchange Server lets an attacker who already holds a valid account run code on the server across the network. The sources give a CVSS score of 8.8 and no further detail.
first public Nov 10, 2026 · 1 source
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Organizations running Microsoft Exchange Server on-premises are the likely exposure; the sources do not name affected builds or configurations. Anyone using Exchange Online only is not affected by this entry, but the sources do not state that directly.
Not affected if exchange-online-only
Who cares exchange-server, on-premises-email, windows
Unknown from the sources. In the analyst’s queue.
No fix yet, per the sources.
Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an authorized attacker to execute code over a network.
This page as .md · .json · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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