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Questel data breach

From Breaches, in the HARD wiki · Updated
This article is about the August 2026 breach of Questel. For every breach, see Breaches.

The Questel data breach exposed 1,226,209 accounts from questel.com in August 2026. The data taken includes names, physical addresses, email addresses and phone numbers and 3 more kinds of data.[1]

Have I Been Pwned verified it and added it to its search on 1 Sep 2026, 1 month later. It is the 388th largest of the 618 breaches in HARD’s list.

What was exposed

Questel’s breach included 7 kinds of data. What each lets criminals do:

DataWhat it’s used for
NamesMakes scam messages personal enough to believe.
Physical addressesUsed to prove who you are, and for scam letters and parcels.
Email addressesExpect scam emails that name the company to look genuine.
Phone numbersExpect scam texts and calls, and a higher risk of someone moving your number to their SIM.
Support ticketsPrivate, and now in someone else’s hands.
EmployersPersonal details that make scam messages more convincing.
Job titlesPersonal details that make scam messages more convincing.

What to do

  1. Check whether you’re in it.Search your email address on Have I Been Pwned. It tells you which breaches it appears in, Questel among them, without showing the data.
  2. Distrust messages that mention Questel.Scammers use breach data to sound genuine. Don’t click links in emails or texts about the breach; go to the site yourself.
  3. Put a PIN on your phone account.Ask your mobile provider for a port-out PIN, so no one can move your number to their SIM.

Timeline

  • : the breach, as best it can be dated.
  • : Have I Been Pwned verifies the data and adds it to its search, 1 month later.

Similar breaches

Breaches that leaked the same kinds of data, closest in time:

See Breaches for all 618, and Updates for keeping your devices patched.

References

  1. ^ Troy Hunt. “Questel”, Have I Been Pwned, added 1 Sep 2026. Breach data licensed CC BY 4.0.