CVE-2026-69641NVD

Vulnerability Summary

Missing authorization in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.

Severity Level

CRITICAL(9.1)

Published Date

Sep 8, 2026

Last Modified

Sep 22, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.83%Probability

Root Weakness (CWE)

CWE-862: Missing Authorization ↗

The software does not perform an authorization check when an actor attempts to access a resource or perform an action.

CVSS v3.1 Base Metrics — Score 9.1 (CRITICAL)

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeChanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

Affected & Patched Versions

Affected Versions

Microsoft Exchange Server
Microsoft Exchange Server Subscription Edition < 15.02.2562.049

Patched Versions

Microsoft Exchange Server Subscription Edition 15.02.2562.049

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