CISA: Windows Task Host flaw now exploited by ransomware gangs
U.S. officials say criminals are now using a newly confirmed weakness in Windows to break into computers and lock files for money. People and organizations using Windows should make sure their systems are updated quickly because this issue is already being used in real attacks.
Who is at risk
Anyone using a Windows computer is at risk, especially businesses, schools, and people who have delayed system updates.
What to watch for
Watch for unexpected file lockouts, ransom notes, sudden computer slowdowns, missing access to documents, or messages asking for payment to restore files.
What to do
Install the latest Windows security updates immediately, restart devices if needed, and make sure important files are backed up somewhere separate from your computer.