Critical Alert 1 Active Exploit Detected Today

CVE-2026-45659 — Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability →
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July 3, 2026

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CVE-2026-41106NVD

Vulnerability Summary

Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.
Severity Level
CRITICAL(9.3)
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-601: 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 RequiredNone
User InteractionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone

External References