July’s Critical Patch Update from Oracle includes CVE-2011-2241, which affects OBIEE versions 10.1.3.4.1 and 184.108.40.206. No details of the exploit other than it “allows remote attackers to affect availability via unknown vectors related to Analytics Server.”
It is categorised with a CVSS score of 5 (on a scale of 10), with no impact on Authentication, Confidentiality, or Integrity, and “Partial+” impact on Availability. So to a security-unqualified layman (me), it sounds like someone could remotely crash your NQSServer process, but not do any more damage than that.
Patches 11833743 and 11833750 for 10.1.3.4.1 and 220.127.116.11 respectively.