Dec. 1, 2017 - ZERODIUM's Tor Browser Bounty has now expired. ZERODIUM is still accepting/acquiring new Tor Browser exploits through its standard zero-day acquisition program.

Sep. 13, 2017 - ZERODIUM, the premium zero-day acquisition platform, announces and hosts a Tor Browser Zero-Day Bounty. ZERODIUM will pay a total of one million U.S. dollars ($1,000,000) in rewards to acquire zero-day exploits for Tor Browser on Tails Linux and Windows. The bounty is open until November 30th, 2017 at 6:00pm EDT, and may be terminated prior to its expiration if the total payout to researchers reaches one million U.S. dollars ($1,000,000).

With the increased number (and effectiveness) of exploit mitigations on modern systems, exploiting browser vulnerabilities is becoming harder every day, but still, motivated researchers are always able to develop new browser exploits despite the complexity of the task, thanks to their skills and a bit of scripting languages such as JavaScript. Today, ZERODIUM sets the bar even higher with a new technical challenge: develop a fully functional zero-day exploit for Tor Browser with JavaScript BLOCKED! Exploits for Tor Browser with JavaScript allowed are also accepted/eligible but have lower payouts (see below).