Denial of Service (DoS) exploits are widely available to exploit CVE-2015-1635, a vulnerability in HTTP.sys, affecting Internet Information Server (IIS) . The patch was released on Tuesday (April 14th) as part of Microsoft's Patch Tuesday. Due to the ease with which this vulnerability can be exploited, we recommend that you expedite patching this vulnerability. Update: We are seeing active exploits hitting our honeypots from 78.186.123.180. We will be going to Infocon Yellow as these scans use the DoS version, not the "detection" version of the exploit. The scans appear to be "Internet wide".