The update -- which addresses nine flaws in version 8.1.2 and earlier -- includes a fix for a stack buffer overflow issue that was reported by four security companies: TippingPoint, Secunia, Core Security Technologies and iSIGHT Partners.
Andrew Storms, director of security operations at network security firm nCircle, said in an email that a public proof-of-concept is available for the vulnerability, which resembles a now-patched Foxit Reader bug that was disclosed earlier this year. An Adobe spokesman said that the company is not aware of any proof-of-concept code.
"This presents a significant risk to the enterprise as Adobe PDF files are a mainstay for corporate communications," he said. "Also, users are not as aware of the potential security risks associated with Adobe files as compared to Microsoft Word or Excel."
Adobe suggests users upgrade to version 8.1.3. Users of version 9 for Reader and Acrobat, released in June, are not vulnerable to any of the flaws patched on Tuesday.