What’s Vulnerable › Vulnerabilities

CVE-2021-27198

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 13.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-26 · updated 2026-06-17
• Weakness: CWE-434

Description

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

How to fix

Upgrade to a fixed version: Visualware MyConnection Server 11.1a. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/161571/VisualWare-MyConnection-Server-11.x-Remote-Code-Execution.html
• http://seclists.org/fulldisclosure/2021/Feb/81
• https://myconnectionserver.visualware.com/download.html
• https://myconnectionserver.visualware.com/support/newrelease.html
• https://www.securifera.com/advisories/cve-2021-27198/
• http://packetstormsecurity.com/files/161571/VisualWare-MyConnection-Server-11.x-Remote-Code-Execution.html
• http://seclists.org/fulldisclosure/2021/Feb/81
• https://myconnectionserver.visualware.com/download.html
• https://myconnectionserver.visualware.com/support/newrelease.html
• https://www.securifera.com/advisories/cve-2021-27198/

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