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CVSS 10.0 CRITICAL Vulnerability

CVE-2026-56191: CVE-2026-56191 - Microsoft Exchange Online Tampering Vulnerability

CVE ID : CVE-2026-56191 Published : July 24, 2026, 1:17 a.m. | 2hours, 3minutes ago Description : Improper authentication in Microsoft Exchange Online allows an unauthorized attacker to perform tampering over a network.…

10.0CVSS Score
CRITICALSeverity
NOCISA KEV
VulnerabilityImpact Type

📋 Vulnerability Details

CVE IDCVE-2026-56191
VendorUnknown Vendor
Affected ProductUnknown Product
Vulnerability TypeVulnerability
CVSS Score10.0 (CRITICAL)
Actively Exploited❌ No known exploitation
Patch StatusPending Vendor Disclosure
Reported ByCYBERDUDEBIVASH SENTINEL APEX Intelligence (via sentinel_apex)

🔬 Technical Analysis

CVE ID : CVE-2026-56191

Published : July 24, 2026, 1:17 a.m. | 2hours, 3minutes ago

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

Severity: 10.0 | CRITICAL

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