NOMVEX CYBER / HELP

Data breach, scam: what to do and where to report

The right steps and the free official services, at the right moment.

Has my email address leaked?

Have I Been Pwned : Free independent service (outside the EU) that tells whether an email address appears in known data breaches. You go there yourself: NOMVEX sends your address nowhere.

If it appears in a breach

Change the password of the affected service, and everywhere you used the same one.
Turn on two-factor sign-in for email, bank and social accounts.
Use a password manager so every service has a different password.
Be wary of emails that mention the breach: fraudsters use it to look credible.

Sources: passwords (Cybermalveillance.gouv.fr, in French) · personal data breach (in French)

You are an organisation and personal data leaked?

The CNIL (French data protection authority) states: « Une notification initiale dans un délai de 72 heures si possible à la suite de la constatation de la violation » (notification to the CNIL). Notify a breach (CNIL, in French)

Where to report

17Cyber : You are a victim (account hacked, fraud, ransomware): diagnosis and referral (France).
Signal Spam : You received a fraudulent or phishing email (France).
33700 : An unwanted or fraudulent SMS or call (France).
PHAROS (internet-signalement.gouv.fr) : Illegal content online (scam, threat, shocking content) (France).
Cybermalveillance.gouv.fr : hameçonnage : The official phishing reflex sheet: how to react (in French).
MonAideCyber (ANSSI) : An association, small business or local authority wants a free diagnostic with a helper.

French public services, links checked on 2026-10-25. Outside France, contact your country’s national service.