Cisco security bug alerts

Does Cisco have a IOS bug alerts subscription service? If there is a security bugs in my IOS, how would I know so that I can upgrade the IOS? Thanks
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btanExec ConsultantCommented:
Receiving Security Vulnerability Information from Cisco

There are several ways to stay connected and receive the latest security vulnerability information from Cisco. Review the following table, and subsequent summaries, to determine the appropriate option.
Cisco Notification Service

Can either try portal notification or rss or email

e.g. Procedure for Creating a Notification
Log in to the Cisco Notification Service website on using your registered account name and password.
Click the Add Notification button and follow the instructions.

e.g.Cisco security vulnerability information is also available via RSS feeds from These feeds are free and do not require an active registration. For information on how to subscribe to the RSS feeds

e.g. Cisco Security Advisories are clear signed with the Cisco PSIRT PGP key and posted to the following e-mail and Usenet news recipients:
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