XARA is an acronym for "Unauthorized Cross-App Resource Access", which describes a category of zero-day vulnerabilities in computer software systems.

Xara is a UK-based software company founded in 1981. It has developed software for a variety of computer platforms, in chronological order: The Acorn Atom, BBC Micro, Z88, Atari ST, Acorn Archimedes, Microsoft Windows and Linux. It was originally called Computer Concepts, Ltd.; the company name was changed in 1995 to Xara, Ltd. and later to The Xara Group, Ltd. On 30 January 2007, Xara was acquired by German company MAGIX AG, and now operates as a wholly owned subsidiary.