CVE-2026-118208 · Vendor
NO FIX YET
An improper access control flaw in Microsoft Exchange Server lets a user who already has an account perform spoofing over the network. The sources do not say which messages or identities can be forged or how much data is exposed.
first public Nov 10, 2026 · 1 source
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Organizations that run Microsoft Exchange Server on-premises and have authenticated users on it. The sources do not list affected versions or configurations.
Not affected if exchange-online
Who cares exchange-server, microsoft, on-premises-email
Unknown from the sources. In the analyst’s queue.
No fix yet, per the sources.
Improper access control in Microsoft Exchange Server allows an authorized attacker to perform spoofing over a network.
This page as .md · .json · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
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