Microsoft releases first security bulletin for Microsoft’s new browser, Microsoft Edge. Four of 14 bulletins, four of which are rated critical, including a critical update for Internet Explorer. None of the Edge vulnerabilities have been publicly disclosed or exploited, but the same cannot be said for IE. The Internet Explorer bulletin, MS15-079, includes patches for 13 vulnerabilities in the browser. The remaining Office bug is an integer underflow vulnerability where Office decreases an integer value beyond its intended minimum value, Microsoft said.
Source: https://threatpost.com/microsoft-patches-critical-vulnerabilities-in-new-edge-browser/114226/