From: g2s <g2s@riseup.net> http://www.linksys.com/us/support-article?articleNum=263800 from that url

Linksys issues security advisory following discovery of CIA exploitation  Solution

If users believe their router firmware may have been compromised, Linksys recommends that users download the latest available firmware from http://www.linksys.com/support/ and update your router.     After the update, please perform a factory reset to ensure no remnants of the compromise remain.  Instructions on how to do a factory reset can be found here.  If users are not able to perform a firmware update or receive an error message during the update, please contact customer support for further instructions. 

Linksys Official Support - Linksys CherryBlossom Advisory----------------- It isn't clear, but I don't see any indication that these remedial processes actually inform the owner of the router if it has been compromised.  Is that an accidental omission, or intentional?                Jim Bell

https://wikileaks.org/vault7/#Cherry%20Blossom