CVE-2021-27198: Visualware Myconnection Server

Critical severity, CVSS 9.8. EPSS: 13.6% chance of exploitation in the next 30 days.

An issue was discovered in Visualware MyConnection Server before v11.1a. Unauthenticated Remote Code Execution can occur via Arbitrary File Upload in the web service when using a myspeed/sf?filename= URI. This application is written in Java and is thus cross-platform. The Windows installation runs as SYSTEM, which means that exploitation gives one Administrator privileges on the target system.

Affected products

• Visualware Myconnection Server: before 11.1a (fixed in 11.1a)

Published 2021-02-26. Last modified 2026-06-17.