Information disclosure in Windows and Windows Server - CVE-2026-50431
Published: July 17, 2026
Vulnerability identifier: #VU138051
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-50431
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to an information disclosure issue in Windows Quality of Service (QoS) Packet Scheduler when handling network traffic. A remote attacker can send crafted traffic to disclose sensitive information.
The issue can disclose certain kernel memory addresses, which could aid further attacks.
How to mitigate CVE-2026-50431
Install security update from vendor's website.