Adobe has confirmed a critical, unpatched vulnerability in its PDF Reader/Acrobat software is being exploited by malicious attackers. The vulnerability affects Adobe Reader and Acrobat 9.1.3 and earlier versions on Windows, Macintosh and UNIX. Adobe described the in-the wild attacks as limited and targeted, suggesting PDF documents rigged with exploits are being attached to e-mails and sent to business targets. Adobe plans to ship a patch for this flaw next Tuesday, October 13, 2009.
Source: https://threatpost.com/adobe-warns-unpatched-pdf-vulnerability-under-attack-100909/72201/