Critical Alert 1 Active Exploit Detected Today

CVE-2026-45659 — Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability →
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July 2, 2026

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CVE-2026-54400NVD

Vulnerability Summary

A malicious actor with access to the network and high privileges could exploit an Improper Access Control vulnerability found in UniFi Access Application to escalate privileges on the host device.
Severity Level
CRITICAL(9.1)
Published Date
Jul 2, 2026
Last Modified
Jul 2, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
Data Pending
Root Weakness (CWE)
CWE-284: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v3.1 Base Metrics
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredHigh
User InteractionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

External References