CVE-2021-27198

Name: CVE-2021-27198
Creator: NVD / NIST
Published: 2021-02-26T23:15:11.263+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 13.62%

Last modified Jun 17, 2026

CVE-2021-27198 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 13.62% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

13.62%

96.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Visualware	Myconnection Server	< 11.1a

References

http://packetstormsecurity.com/files/161571/VisualWare-MyConnection-Server-11.x-Remote-Code-Execution.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Feb/81Mailing List, Third Party Advisory
https://myconnectionserver.visualware.com/download.htmlProduct, Vendor Advisory
https://myconnectionserver.visualware.com/support/newrelease.htmlRelease Notes, Vendor Advisory
https://www.securifera.com/advisories/cve-2021-27198/Third Party Advisory
http://packetstormsecurity.com/files/161571/VisualWare-MyConnection-Server-11.x-Remote-Code-Execution.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Feb/81Mailing List, Third Party Advisory
https://myconnectionserver.visualware.com/download.htmlProduct, Vendor Advisory
https://myconnectionserver.visualware.com/support/newrelease.htmlRelease Notes, Vendor Advisory
https://www.securifera.com/advisories/cve-2021-27198/Third Party Advisory

Timeline

Published: Feb 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27198?

How severe is CVE-2021-27198?

CVE-2021-27198 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 13.62% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27198?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27198?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST