VulnerabilityPublished
ZDI-26-849: Microsoft Qlib RestrictedUnpickler Deserialization of Untrusted Data Remote Code Execution Vulnerability
Source Zero Day Initiative
0
Severity
HighRated High by Zero Day Initiative
Data as of 2 Nov 2026, 22:15 UTC
What to do
Description
A remote code execution vulnerability exists in Microsoft Qlib due to unsafe deserialization in the RestrictedUnpickler component. Exploitation requires user interaction, such as visiting a malicious webpage or opening a malicious file. The vulnerability has a high severity rating with a CVSS score assigned by ZDI as 7.8.
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