CVE-2021-27198
An issue was discovered in Visualware MyConnection Server through 11.0b build 5382....
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2021-27198- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-434
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2021-27198- Updated
- 2026-11-02
EUVDEUVD-2021-13963 No score
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.
- Record
EUVD-2021-13963- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q9xv-9vww-9m7g No score
An issue was discovered in Visualware MyConnection Server through 11.0b build 5382....
An issue was discovered in Visualware MyConnection Server through 11.0b build 5382. 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.
- Record
GHSA-q9xv-9vww-9m7g- Weakness
- CWE-434
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | rwincey/CVE-2021-27198 | 2023-10-25 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-27198 is a critical vulnerability (CVSS 9.8) in Visualware Myconnection Server, published February 26, 2021. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 12.7%, the 96th percentile. No source names a fixed version.
References
myconnectionserver.visualware.com/download.html
seclists.org/fulldisclosure/2021/Feb/81
packetstormsecurity.com/files/161571/VisualWare-MyConnection-Server-11.x-Remote-Code-Execution.html
securifera.com/advisories/cve-2021-27198
nvd.nist.gov/vuln/detail/CVE-2021-27198
github.com/advisories/GHSA-q9xv-9vww-9m7g