CVE-2026-69356: Microsoft Exchange Server Spoofing Vulnerability
Published Sep 8, 2026
·Updated
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
Other sources
Microsoft Exchange Server Spoofing Vulnerability
— Microsoft
Affected Software
9 affected componentsFixes available
Microsoft Exchange Server
Microsoft Exchange Server Subscription Edition RTM<15.02.2562.049
15.02.2562.049
Microsoft Exchange Server 2019=14
15.02.1544.046
Microsoft Exchange Server 2019=15
15.02.1748.051
Microsoft Exchange Server 2016=23
15.01.2507.073
Microsoft Exchange Server=2016-cumulative_update_23
Microsoft Exchange Server=2019-cumulative_update_14
Microsoft Exchange Server=2019-cumulative_update_15
Microsoft Exchange Server Subscription Edition<15.02.2562.049
Remediation
Event History
Sep 8, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·05:12 PM
Data Sourced
via MITRE·05:12 PM
DescriptionSeverity
Data Sourced
via NVD·06:18 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What access does an attacker need to exploit this issue?
The vulnerability is reachable over a network and does not require prior privileges. Exploitation requires user interaction.
2
What could exploitation allow?
An attacker could perform spoofing through a cross-site scripting flaw in Microsoft Exchange Server. The supplied severity vector indicates potential high confidentiality and integrity impact, with no availability impact indicated.
3
Is a default Exchange Server configuration affected?
The provided information does not state which Exchange Server versions, configurations, or deployment modes are affected.