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CVE-2021-27198

CRITICAL
9.8
CVSS Score
Published: February 26, 2021 at 10:53 PM UTC
Updated: June 17, 2026 at 03:44 AM UTC
1 product affected across 1 vendorMyconnection Server

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Severity
CRITICAL9.8
Exploit prediction
EPSS 13%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Myconnection Server· Visualware
95%
v < 11.1a
Affected range stops below 11.1a, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (5)

x_refsource_MISCThird Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/161571/VisualWare-MyConnection-Server-11.x-Remote-Code-Execution.html
Mailing Listx_refsource_FULLDISCThird Party Advisory
Source: [email protected]
http://seclists.org/fulldisclosure/2021/Feb/81
x_refsource_MISCProductVendor Advisory
Source: [email protected]
https://myconnectionserver.visualware.com/download.html
x_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
https://myconnectionserver.visualware.com/support/newrelease.html
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://www.securifera.com/advisories/cve-2021-27198/

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-434

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