Use VPNs, secure WiFi, lock your environment, and don't work on public devices.
Remote work expands an organization's attack surface to include every employee's home network. A home network is typically less secured than a corporate office: default router credentials, unpatched firmware, mixed personal and work devices, and neighbors potentially on the same ISP infrastructure.
Change your home router's default admin credentials immediately if you have not already — every manufacturer uses the same default username and password, published in easily found online lists. An attacker who can access your router can intercept all traffic on your home network, including your work connections.
Keep work and personal devices separate. Using a personal laptop for work means personal security posture (personal software, personal browsing habits) applies to work data. Using a work laptop for personal browsing means personal risk is introduced to the corporate environment. Neither is ideal, and both are avoidable.
Video calls introduce physical security considerations. Your background may reveal your home address, family details, or confidential information on whiteboards or screens. Conversations can be overheard in open-plan homes. Use a virtual background and find a private space for calls where sensitive content is discussed.