The Java Web Start implementation in Sun Java SE 6 before Update 17 does not properly handle the interaction between a signed JAR file and a JNLP (1) application or (2) applet, which has unspecified impact and attack vectors, related to a "regression," aka Bug Id 6870531.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 62.8%