Microsoft and Adobe have released security updates to patch critical flaws in Internet Explorer and Flash which could allow an attacker to remotely execute code on a targeted system without user interaction or warning.
The Microsoft update is part of a scheduled Patch Tuesday release which includes 13 bulletins addressing 22 vulnerabilities in Windows, IE, Office, developer tools and .Net Framework products.
Two of the vulnerabilities are rated 'critical' and are considered the highest priority for deployment, according to the Microsoft Security Bulletin Summary for August 2011. The IE and DNS Server flaws could allow for remote code execution.
"Administrators should place priority on the IE and Windows updates," said Dave Marcus, director of research and communications at McAfee Labs.
"If left unpatched, the vulnerability can result in remote code execution attacks and can expose users to drive-by download attacks via the browser."
Nine of the remaining Microsoft bulletins are rated 'important' and two 'moderate', covering remote code execution, elevation of privileges, denial-of-service and information disclosure attacks.
Adobe, meanwhile, has posted a security update for a Flash Player flaw which could allow an attacker to crash the media player and take control of a targeted system. No active attacks on the vulnerability have been reported.
The update is being released for the Windows, Mac OS, Linux, Android and Solaris versions of Flash Player, and the Mac OS and Windows versions of Adobe Air.
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