CVE-2021-27198
9.8
CRITICAL · CVSS 3.1 · EPSS 13.6% (pctl 96)
Patch early
EPSS 13.6% — above the 10% action threshold.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 13.62% — more likely to be exploited than 96% of all CVEs |
| Weakness | CWE-434 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-02-26 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| visualware | myconnection server |
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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