Name: CVE-2026-55009: Deserialization of Untrusted Data
Creator: Rapid7
Published: 2026-07-14T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-55009, CWE-502, CVSS 7.8, EPSS 0.01652

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

CVSS Details

CVSS 3.1 Base Score: 7.8
CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Microsoft Exchange	—	Download and install Microsoft KB5103214Download and install Microsoft KB5103215Download and install Microsoft KB5103212Download and install Microsoft KB5103213	Jul 14, 2026	Jul 14, 2026

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CVSS Details

Covered by Rapid7

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