User blog comment:Timeoin/Dragonborn Screenshots/@comment-4043978-20121119225120/@comment-26474238-20121120001616

Since he hasn't been proclaimed as dead, yet, it is a fact that TES canon still considers him as alive. I've also went ahead and brushed up on my lore again. From what I've found, it is a mere rumour that Vivec was captured by Dremora and brought to Oblivion during the Oblivion Crises. Another popular rumour used in TES:IV was that the Neravarine killed Vivec.