On Wednesday, Adobe warned of a 'zero-day' vulnerability in Reader 9.3.4 and earlier versions, and Acrobat 9.3.4 and earlier versions for Windows, Macintosh, and UNIX reportedly being exploited in the wild. The hole could allow an attacker to take control of an affected computer and potentially affects millions of computers using the Adobe software, which's the most popular PDF (portable document format) viewer.
The company said it's evaluating the schedule for releasing a security update to resolve the issue.
"Unfortunately, there're no mitigations we can offer," the advisory CVE-2010-2883 said. "However, Adobe is actively sharing information about this vulnerability (and vulnerabilities in general) with partners in security community to enable them to quickly develop detection and quarantine methods to protect users until a patch is available."