An anonymous user just posted on www.qnxzone.com about a QNX6 root exploit. It is known to work for all the QNX6.x releases.
Rumor says there are several other root exploits available for QNX6. Keep an eye on qnxzone.com for more disclosures.
It is said that those exploits were fixed internally in QSSL but for some unknown reasons, they were not included in the latest QNX 6.2 release.