CVE-2026-87692: Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.

PriorityP350high7.8CVSS 3.1

AVLACLPRLUINSUCHIHAH

EPSS

1.59%

75.4th percentile

Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
microsoft	microsoft_exchange_server_2016_cumulative_update_23	>= 15.01.0.0 < 15.01.2507.077	15.01.2507.077
microsoft	microsoft_exchange_server_2019_cumulative_update_14	>= 15.02.0.0 < 15.02.1544.050	15.02.1544.050
microsoft	microsoft_exchange_server_subscription_edition_rtm	>= 15.02.0.0 < 15.02.2562.056	15.02.2562.056

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