The Up.time client for Windows is vulnerable to an format string attack as well as a buffer overflow, and may allow unauthenticated users to perform certain commands.
CWE-134: Uncontrolled Format String - CVE-2015-2894
For version 6.0 and 7.2, an unauthenticated attacker on the network may send either the "%n" or "%s" format parameters will cause the application to crash. This vulnerability was addressed in version 7.6.
A remote unauthenticated user may be able to perform a denial of service on Up.time, or obtain system information for future use. It may also be possible to execute code.
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Thanks to Matthew Benton and Richard Kelley for reporting this issue to us.