Fabian Faessler
security researcher
Fabian Faessler, known online as LiveOverflow, is a German security researcher, computer scientist and YouTuber. His YouTube channel, 
LiveOverflow, covers IT security topics including capture-the-flag hacking competitions, game hacking, web security, browser exploitation, memory corruption and walkthroughs of real exploits; it had about 930,000 subscribers in November 2025. He is the owner of Security Flag GmbH.
Fabian Faessler’s social media accounts
Social
X (Twitter): @liveoverflow- YouTube: @liveoverflow, channel ID UClcE-kVhqyiHCcjYwcpfj9w
Bluesky: @liveoverflow.bsky.social
Instagram: @liveoverflow
Facebook: @LiveOverflow
GitHub: @LiveOverflow
Reddit: @liveoverflow
Web
3 external identifiers
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