CERT-In warns of critical security flaws in older Google Chrome versions affecting Windows, macOS, and Linux. These vulnerabilities allow remote attackers to execute code or steal data. Users are urged to immediately update to Chrome version 135.0.7049.52 (Linux) or 135.0.7049.41/42 (Windows/macOS) to mitigate risks. The update process involves accessing Chrome's settings and selecting 'About Google Chrome' to initiate the update and relaunch.