CVE-2026-55009

—

CVSS 3.1

7.8 high

EPSS

3%p84

Published

Jul 14, 2026 (Jul 14, 2026)

Modified

Jul 24, 2026

Description

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

Vendors: microsoft
Products: exchange server, exchange server subscription edition
Weakness: CWE-502
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (2.5%)

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