Security Updates give the most recent protection content for NIS product, which protect networked critical systems and remote and mobile users from unwanted network intrusions and hackers, as well as from viruses, Trojans, and worms.

To download and install the Security Update 426 you need to run LiveUpdate feature of Norton Internet Security product. Please note that LiveUpdate definition identifier of Security Update 426 is 20110803.030 and its description was last modified on August 3, 2011 3:42:14 PM PDT.

Security Update 426 adds coverage for the following vulnerabilities and threats:

• Attack: Mozilla 'nsTreeRange' CVE-2011-0073:
  This signature detects remote code execution vulnerability in Mozilla Firefox/SeaMonkey.
  
  
• System Infected: Malicious File Download Request:
  This signature will detect attempt to download malicious files through HTTP requests.
  
  

Security Update 426 provides updated coverage for the following vulnerabilities and threats:

• Web Attack: Worldweaver DX Studio Player Plugin:
  This signature detects a remote code vulnerability in Worldweaver DX Studio player which may result in remote execution.
  
  
• Fake App Attack: Fake AV Website 9:
  A Web based attack relating to misleading applications has been blocked. No further action is required, but you may wish to update your virus definitions and run a full system scan as a precautionary measure.
  
  
• System Infected: Backdoor Trojan DNS Request:
  This signature detects malicious Backdoor Trojan activity on the compromised computer.
  
  

Security Update 426 removes coverage for the following vulnerabilities and threats:

• Fake App Attack: Fake AV Website 18:
  A Web based attack relating to misleading applications has been blocked. No further action is required, but you may wish to update your virus definitions and run a full system scan as a precautionary measure.