CVE-2026-45583

High

Description

Improper control of generation of code ('code injection') in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.

SeverityHigh

CVSS7.5

Exploit probability—

Product

Microsoft Exchange Server

PublishedJun 9, 2026

First seenJun 9, 2026

Weakness typeCWE-94Code injection

How to fix

Update

microsoft exchange_server_subscription_edition15.02.2562.043 or later

Patches

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45583

Affected products

Product	Affected versions	Fixed in
microsoft exchange_server	2016, 2019	—
microsoft exchange_server_subscription_edition	v < 15.02.2562.043	15.02.2562.043

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