CVE-2026-118154 · Vendor
NO FIX YET
Microsoft Exchange Server trusts input it should not in a security decision, so an attacker with a valid account on the network can elevate privileges. NVD rates it high (CVSS 8.8).
first public Nov 10, 2026 · 1 source
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Organisations running on-premises Microsoft Exchange Server where users hold valid accounts on the network. The sources do not list affected builds, so check the vendor advisory for exact ranges. Exchange Online customers are not covered by this entry.
Not affected if exchange-online, no-on-prem-exchange
Who cares exchange-server, on-premises, windows
Get-ExchangeServer in Exchange Management ShellNo fix yet, per the sources.
Reliance on untrusted inputs in a security decision in Microsoft Exchange Server allows an authorized attacker to elevate privileges 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
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
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