Adobe plans to release out-of-band security updates for its Reader and Acrobat products for the third time in the past year.
The mid-August release comes ahead of the next quarterly security update for the products scheduled for 12 October.
The emergency patches will be for several critical security issues, including a zero-day vulnerability disclosed at the Black Hat USA 2010 security conference.
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These updates will be made available for Reader 9.3.3 and earlier versions for Windows, Macintosh, and UNIX and Acrobat 9.3.3 and earlier versions for Windows and Macintosh, according to a security advisory.
Adobe is not aware of exploits in the wild for any of the issues addressed in the updates, the company said in a blog post.
At the Black Hat conference, Adobe announced that it is to join Microsoft's active protections programme (MAPP) later this year.
Adobe is to be the first outside company to join the programme, set up two years ago to enable advanced information-sharing on Microsoft product vulnerabilities with security software providers.
"MAPP is a tried and proven model giving an upper hand to a network of global defenders, who all rally behind the shared purpose of protecting our mutual customers," said Brad Arkin, senior director of product security at Adobe.