Critical Alert 1 Active Exploit Detected Today

CVE-2026-45659 Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability →
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CVE-2026-50040NVD

Vulnerability Summary

Storage Concentrator (SC & SCVM) is vulnerable to reflected cross-site scripting due to unsanitized content being echoed back in 404 error pages. An attacker can craft a malicious URL that, when visited by an authenticated user, causes arbitrary script content to execute within the victim's browser session in the context of the application. This could be leveraged to steal session cookies, redirect users, or perform unauthorized actions on behalf of the victim.
Severity Level
MEDIUM(6.1)
Published Date
Jun 30, 2026
Last Modified
Jul 1, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.24%Probability
Root Weakness (CWE)
N/A
CVSS v3.1 Base Metrics
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone