CVE-2021-27198 in the critical feed json
An issue was discovered in Visualware MyConnection Server before v11.1a.
published 2021-02-26 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13963
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 12.7%
- EPSS 12.7% chance of exploitation in 30 days, percentile 96%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- visualware myconnection_server 11.1a
Exploit prediction
12.69% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
-
myconnectionserver.visualware.com
/download.html
product, vendor-advisory
-
myconnectionserver.visualware.com
/support/newrelease.html
release-notes, vendor-advisory
-
seclists.org
/fulldisclosure/2021/Feb/81
mailing-list, third-party-advisory
-
packetstormsecurity.com
/files/161571/VisualWare-MyConnection-Server-11.x-Remote-Code-Execution.html
third-party-advisory, vdb-entry
-
securifera.com
/advisories/cve-2021-27198/
third-party-advisory
Sources
- CVE List CVE-2021-27198
- NVD CVE-2021-27198
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.