Per this notice (https://www.cisa.gov/news-events/alerts/2025/05/12/update-how-cisa-shares-cyber-related-alerts-and-notifications), CISA no longer publishes an RSS feed. Through some magic, this account will repost the contents of CISA email bulletins, which will allow you to subscribe with an RSS reader to: https://infosec.exchange/@cisareflector.rss
This is not an official account. This account is maintained by @jerry
Please also see: https://infosec.exchange/@cR0w/114496314509138368 for an alternate way to get an RSS feed of the CISA KEV
Jerry here. No legit email has come through from CISA yet. Once emails do hit, I may have to tweak the formatting, so patience please.