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CVE-2026-56191NVD
Vulnerability Summary
Improper authentication in Microsoft Exchange Online allows an unauthorized attacker to perform tampering over a network.
CVSS v3.1 Base Metrics
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh