Update your browsers (Chrome, Firefox, Edge, Safari, etc.) on all devices you use for work or personal browsing. This ensures you have the latest revocation lists and trust store updates that block the weak certificates. Restart your browsers after updating.*
Check if your browser is still exposed using this community tool: https://echudhra.com/ which tests whether your browser still trusts the affected keys. - Also ensure your operating system and other software (especially anything that maintains its own certificate trust store) are up to date.
Most modern browsers have already received protective updates via their automatic revocation mechanisms, but explicitly updating is the safest step.
Non-browser clients, older devices, or software that does not automatically consume revocation lists may remain at higher risk until updated.
Cybersecurity month at peak.
Some tips for users as well: