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Vulnerability record · CVE-2021-27198 · published 26 February 2021

CVE-2021-27198: Visualware myconnection server unrestricted file upload vulnerability

Visualware · Myconnection Server

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.

9.8 CVSS 3.1 Critical EPSS 14% · top 3.7% CWE-434 · Unrestricted file upload
9.8CVSS 3.1 base score, v2 10.0
14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/161571/VisualWare-MyConnection-Server-11.x-Remote-Code-Execution.html Third Party AdvisoryVDB Entry
http://seclists.org/fulldisclosure/2021/Feb/81 Mailing ListThird Party Advisory
https://myconnectionserver.visualware.com/download.html ProductVendor Advisory
https://myconnectionserver.visualware.com/support/newrelease.html Release NotesVendor 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.html Third Party AdvisoryVDB Entry
http://seclists.org/fulldisclosure/2021/Feb/81 Mailing ListThird Party Advisory
https://myconnectionserver.visualware.com/download.html ProductVendor Advisory
https://myconnectionserver.visualware.com/support/newrelease.html Release NotesVendor Advisory
https://www.securifera.com/advisories/cve-2021-27198/ Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2023-42034Visualware myconnection server cross-site scripting vulnerabilityVisualware MyConnection Server doRTAAccessCTConfig Cross-Site Scripting Authentication Bypass Vulnerability. This vulnerability allows remote attacke…EPSS 1.4%7.5CVE-2023-42032Visualware myconnection server vulnerabilityVisualware MyConnection Server doRTAAccessUPass Exposed Dangerous Method Information Disclosure Vulnerability. This vulnerability allows remote attac…EPSS 1.2%7.5CVE-2021-27509Visualware myconnection server incorrect authorization vulnerabilityIn Visualware MyConnection Server before 11.0b build 5382, each published report is not associated with its own access code.EPSS 1.0%7.2CVE-2023-42033Visualware myconnection server path traversal vulnerabilityVisualware MyConnection Server doPostUploadfiles Directory Traversal Remote Code Execution Vulnerability. This vulnerability allows remote attackers …EPSS 3.3%6.5CVE-2023-42035Visualware myconnection server xml external entity (xxe) vulnerabilityVisualware MyConnection Server doIForward XML External Entity Processing Information Disclosure Vulnerability. This vulnerability allows remote attac…EPSS 1.2%4.3CVE-2015-2043Visualware myconnection server cross-site scripting vulnerabilityMultiple cross-site scripting (XSS) vulnerabilities in Visualware MyConnection Server 8.2b allow remote attackers to inject arbitrary web script or H…EPSS 1.0%4.3CVE-2014-5113Visualware myconnection server cross-site scripting vulnerabilityMultiple cross-site scripting (XSS) vulnerabilities in test.php in Visualware MyConnection Server 9.7i allow remote attackers to inject arbitrary web…EPSS 1.9%10.0CVE-2026-56291Balbooa Forms Joomla extension unauthenticated arbitrary file upload RCEThe Balbooa Forms extension for Joomla before version 2.4.1 accepts file uploads without authentication and does not restrict file type, allowing exe…KEVEPSS 15%analysed

Source: NIST National Vulnerability Database (record CVE-2021-27198), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.