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CVE-2026-87696 Details

Improper verification of cryptographic signature in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

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URL	Source(s)	Tag(s)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87696	[email protected]	PatchVendor Advisory

CWE-ID	CWE Name	Source
CWE-347	Improper Verification of Cryptographic Signature	[email protected]

Product	Versions
microsoft exchange server	2016 cumulative_update_23 2019 cumulative_update_14 2019 cumulative_update_15
CPE cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_23:::::: cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_14:::::: cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_15:::::: Remediation No remediation found in references.
microsoft exchange server subscription edition	< 15.02.2562.056
CPE cpe:2.3:a:microsoft:exchange_server_subscription_edition:::::::: Remediation No remediation found in references.

4 change records found show changes

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