CVE-2026-56191

CVE-2026-56191CVE-2026-56191

Description

Improper authentication in Microsoft Exchange Online allows an unauthorized attacker to perform tampering over a network.

Scoring

CVSS 10.0 ()
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Last modified2026-07-24
Sourced from NVD. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.