CVE-2026-50447
A heap-based buffer overflow in Windows Message Queuing lets an attacker send a crafted message over the network and run arbitrary code. The flaw can be triggered without authentication or user interaction and affects multiple Windows 10 and Windows 11 builds.
No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.
Who is affected
Microsoft Windows 10 (1607, 1809, 21H2, 22H2) and Windows 11 (24H2, 25H2, 26H1) – all listed builds are vulnerable.
Real-world impact
An attacker could remotely execute code with the privileges of the Message Queuing service, potentially taking full control of the affected machine.
Why this severity
The CVSS score of 9.8 reflects that the vulnerability is exploitable over the network, requires no user interaction, and grants complete compromise (confidentiality, integrity, availability).
What to do about it
No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.
No fix documented in sources
Timeline
- Jul 14, 2026 · 20d agoPublishedDisclosed and added to the National Vulnerability Database.
- Jul 22, 2026 · 12d agoAdvisory updatedThe NVD record was last revised.
How it’s attacked
References & advisories
- msrc.microsoft.com/update-guide/vulnerability/…patchvendor advisory