A recent security vulnerability has highlighted the importance of removing your phone number from your Google account. A researcher was able to access private phone numbers linked to Google accounts using just the Gmail address. This information is typically sensitive and not meant to be public.

Google has acknowledged the issue and released an update to address it. The company emphasizes the significance of collaborating with the security research community to identify and resolve such vulnerabilities promptly.

Having your phone number exposed poses significant privacy risks, especially in secure messaging and account recovery scenarios. While this incident was a proof of concept and not exploited, it underscores the need to take precautions.

Your phone number is stored in two areas within your Google account: account recovery and two-factor authentication (2FA). It is crucial to only use your number for account recovery purposes and remove it from 2FA settings.

Google recommends utilizing two-step verification (2SV) with physical hardware such as passkeys or authenticator apps for enhanced security. Additionally, Google has been urging users to enhance the security of their accounts through recent updates.

One of the risks associated with phone number exposure is SIM swapping, where an attacker can manipulate a phone company into issuing a new SIM card using your number. This can lead to unauthorized access to your account, particularly if your 2FA is SMS-based.

Another significant risk is falling victim to fake calls from purported technical support desks. Google has been addressing such attacks and advises users that they will never contact them for security or account-related issues.

In addition to removing your phone number as a 2FA option, it is crucial to avoid engaging with any technical or customer support desk that contacts you via phone or text regarding account, payment, or password matters.