CVE-2026-56191 | CyberRota

CyberRota Analysis

AI-Generated

Microsoft Exchange Online is vulnerable due to improper authentication, enabling unauthorized attackers to manipulate data over the network. The critical severity of this vulnerability (CVSS 10.0) poses significant risks to data integrity and confidentiality. Organizations using Microsoft Exchange should prioritize immediate remediation to safeguard against potential exploitation.

CVE

CVE-2026-56191

Severity

CRITICAL

CVSS

EPSS

0.67%

Microsoft Exchange

Original NVD Description

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

Related CVEs

Other vulnerabilities affecting the same vendor(s)

CVE-2026-75624 HIGH CVE-2026-87654 CRITICAL CVE-2026-87653 MEDIUM CVE-2026-87648 HIGH CVE-2026-87644 HIGH CVE-2026-87621 CRITICAL