Hi,
I think the answer is no impact.
I did an initial search on a vcsa 5.5 running on MS windows server recursively with command "dir /s/b log4*.jar"
It seems to be only using log4j version 1.x as you can see below
Currently they say almost all versions of Log4j are vulnerable, starting from 2.0-beta9
C:\Program Files\VMware\Infrastructure\Inventory Service\lib\log4j-1.2.14.jar
C:\Program Files\VMware\Infrastructure\Inventory Service\sso\lib\log4j-1.2.14.jar
C:\Program Files\VMware\Infrastructure\Orchestrator\app-server\deploy\vco\WEB-INF\lib\log4j-1.2.17.jar
C:\Program Files\VMware\Infrastructure\Orchestrator\app-server\temp\dars\o11nplugin-ssh.dar\lib\log4j-1.2.17.jar
C:\Program Files\VMware\Infrastructure\Orchestrator\app-server\temp\dars\o11nplugin-wfdocs.dar\lib\log4j-1.2.17.jar
C:\Program Files\VMware\Infrastructure\Orchestrator\apps\lib\log4j.jar
C:\Program Files\VMware\Infrastructure\Orchestrator\configuration\lib\o11n\log4j-1.2.17.jar
C:\Program Files\VMware\Infrastructure\Profile-Driven Storage\lib\log4j-1.2.14.jar
C:\Program Files\VMware\Infrastructure\tomcat\webapps\brain\WEB-INF\lib\log4j-over-slf4j-1.7.2.jar
C:\Program Files\VMware\Infrastructure\tomcat\webapps\eam\WEB-INF\lib\log4j-1.2.14.jar
C:\Program Files\VMware\Infrastructure\tomcat\webapps\ls\WEB-INF\lib\log4j-1.2.14.jar
C:\Program Files\VMware\Infrastructure\tomcat\webapps\statsreport\WEB-INF\lib\log4j-1.2.14.jar
C:\Program Files\VMware\Infrastructure\tomcat\webapps\vsm\WEB-INF\lib\log4j-1.2.14.jar
C:\Program Files\VMware\Infrastructure\tomcat\webapps\vws\WEB-INF\lib\log4j-1.2.14.jar
C:\Program Files\VMware\Infrastructure\VirtualCenter Server\isregtool\log4j-1.2.14.jar
C:\Program Files\VMware\Infrastructure\VirtualCenter Server\ssoregtool\lib\log4j-1.2.14.jar
C:\Program Files\VMware\Infrastructure\VMware\CIS\vmware-sso\lib\log4j-1.2.16.jar
C:\Program Files\VMware\Infrastructure\vSphereWebClient\server\repository\usr\log4j-over-slf4j-1.6.1.jar
C:\Program Files\VMware\Infrastructure\vSphereWebClient\SsoRegTool\lib\log4j-1.2.14.jar
C:\ProgramData\VMware\CIS\runtime\VMwareSTS\webapps\lookupservice\WEB-INF\lib\log4j-1.2.14.jar
C:\ProgramData\VMware\CIS\runtime\VMwareSTS\webapps\sso-adminserver\WEB-INF\lib\log4j-1.2.14.jar
C:\ProgramData\VMware\CIS\runtime\VMwareSTS\webapps\sts\WEB-INF\lib\log4j-1.2.14.jar
C:\ProgramData\VMware\CIS\runtime\VMwareSTS\webapps\websso\WEB-INF\lib\log4j-1.2.14.jar
C:\Users\administrator\AppData\Local\Temp\jetty-0.0.0.0-9084-vum-fileupload.war-_vum-fileupload-any-\webapp\WEB-INF\lib\log4j-1.2.8.jar
C:\Users\administrator\AppData\Local\Temp\Jetty_0_0_0_0_9084_vum.fileupload.war__vum.fileupload__dgjc5a\webapp\WEB-INF\lib\log4j-1.2.8.jar
C:\Users\All Users\VMware\CIS\runtime\VMwareSTS\webapps\lookupservice\WEB-INF\lib\log4j-1.2.14.jar
C:\Users\All Users\VMware\CIS\runtime\VMwareSTS\webapps\sso-adminserver\WEB-INF\lib\log4j-1.2.14.jar
C:\Users\All Users\VMware\CIS\runtime\VMwareSTS\webapps\sts\WEB-INF\lib\log4j-1.2.14.jar
C:\Users\All Users\VMware\CIS\runtime\VMwareSTS\webapps\websso\WEB-INF\lib\log4j-1.2.14.jar
C:\Users\svc-vmware\AppData\Local\Temp\jetty-0.0.0.0-9084-vum-fileupload.war-_vum-fileupload-any-\webapp\WEB-INF\lib\log4j-1.2.8.jar
Regards,
Raymond