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Data breaches → CTT

Was your data in the CTT breach?

2026 · ctt.pt · ~468,124 accounts exposedHigh severity · 7/10

CTT (ctt.pt) suffered a data breach in 2026 that exposed around 468,124 accounts. If you had an account, some of your personal data may be circulating in leaked databases. The fastest way to know is to check your own email — free, in about 30 seconds, no password required.

What happened

In April 2026, data allegedly obtained from CTT, Portugal's national postal service, was posted to a public hacking forum. The data included 468k unique email addresses along with names, phone numbers and parcel tracking numbers which can be used to retrieve the tracking history of the parcel.

Breach details sourced from Have I Been Pwned, the industry-standard breach database. Risk analysis by Nullivo.

What was exposed, and why it matters

Not all breaches carry the same risk — what matters is which fields leaked. Here is what the CTT breach exposed and what each item actually enables:

Phone numbers

Enables SIM-swap attacks (hijacking your number to intercept SMS codes), smishing, and voice scams that appear to come from your bank.

Names and usernames

Links this leak to your other accounts — a reused username lets anyone build a profile of you across platforms.

Email addresses

Puts you on spam and phishing lists, and confirms to attackers that you hold an account with this service — which makes impersonation emails more believable.

What to do if you were affected

These steps are ordered for this specific breach — the most urgent action given what leaked comes first.

  1. Phone numbers: Move two-factor authentication off SMS to an authenticator app or passkey, and add a port-out PIN with your mobile provider.
  2. Names and usernames: Search your usual username to see what else it exposes, and use distinct handles for sensitive accounts.
  3. Email addresses: Treat any message referencing this service with suspicion, and never act on links in unexpected emails.
  4. Check whether your own email appears in this breach — run a free scan to confirm before you spend time on the steps above.

How urgent is this now?

This breach is recent, so the data is actively traded and the risk is at its highest right now.

Remember: a breach can't be "un-leaked" — once a database is out, it exists in countless copies. The goal is to make the leaked data useless: change what can be changed, lock down what can't, and remove what has been republished.

Check if your email was exposed.Nullivo's free scan checks your own verified email against known breaches — including CTT — in 30 seconds. No password, no signup, and we only ever scan your own email. Run your free scan →

Frequently asked questions

What data was exposed in the CTT breach?

The CTT breach exposed phone numbers, names and usernames, email addresses. Enables SIM-swap attacks (hijacking your number to intercept SMS codes), smishing, and voice scams that appear to come from your bank.

How many people were affected by the CTT breach?

Around 468,124 accounts were exposed, making it a mid-sized breach.

What should I do if I had a CTT account?

Move two-factor authentication off SMS to an authenticator app or passkey, and add a port-out PIN with your mobile provider. You can check whether your own email appears in this breach with a free Nullivo scan — no password required.

Breaches that exposed similar data

If the CTT breach affected you, these breaches exposed comparable information — worth checking too, since leaked datasets are routinely combined.

See all breaches we cover →