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Qt Network Schannel Support Denial-of-Service Vulnerability

Vulnerability

A denial-of-service vulnerability has been identified in Qt Network's Schannel support on Windows. This issue arises from incomplete cleanup, which can lead to prolonged service disruption. The vulnerability affects Qt versions 5.15.0 through 6.8.3, as well as 6.9.0 prior to 6.9.2.

Impact

Exploitation of this vulnerability causes a denial-of-service condition, leading to prolonged service disruption.

Added: Oct 16, 2025, 10:17 AM
Updated: Oct 16, 2025, 3:45 PM

Vulnerability Rating

Custom Algorithm
spread
7.8
impact
2.5
exploitability
5.3
remediation
0.0
relevance
0.7
threat
3.2
urgency
2.9
incentive
1.7

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.