"All currently supported shipping versions of Adobe Reader and Acrobat (Adobe Reader and Acrobat 9.1, 8.1.4, and 7.1.1 and earlier versions) are vulnerable to this issue," said Adobe in a blog post.
"Adobe plans to provide updates for all supported versions for all platforms (Windows, Macintosh and Unix) to resolve this issue."
The company has given no timeline for the release of a patch, but has said that no exploits have yet been seen in the wild.
The announcement is embarrassing for Adobe, coming after a series of flaws revealed last month. Some security experts are even recommending that users switch to free, alternative document readers.
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