Avast Data Breach (2014): What Was Exposed & What To Do
SourceBreach data provided in part by Have I Been Pwned, used under CC BY 4.0.
The Avast Data Breach (2014) (reported May 26, 2014) exposed Email addresses, Passwords and Usernames belonging to roughly 423K people. If you have an account with them, your information may now be circulating on the open web and with data brokers. Here’s exactly what happened, how to check if you were affected, and what to do next.
Breaking down the breach
The breach involved the Avast anti-virus forum. Public reporting at the time stated that 423,000 member records were accessed and later appeared online. The affected system was a Simple Machines forum that held usernames, email addresses, and password hashes. No further details on the method of access, the duration of the intrusion, or any subsequent actions by the operators have been disclosed in available records.
How a breach like this happens
Incidents affecting online forums commonly begin with the exploitation of unpatched software, weak authentication controls, or stolen administrative credentials. Once inside the system, an attacker can copy database tables that contain user account information. Passwords stored only as hashes can still be processed offline if the hashing method is weak or if no additional protective measures such as salting were applied. Public disclosure often occurs after the data are posted on file-sharing or trading sites.
Who is Avast?
Avast develops and distributes antivirus and security software used by consumers and businesses. Its products are installed on millions of devices worldwide, and the company has long maintained user forums to support customers and discuss product issues. A breach of such a forum can expose contact details and account credentials belonging to people who registered to seek technical help or participate in discussions.
What data was at risk
The records that were reported exposed contained three categories of information. Exact confirmation of additional fields, such as registration dates or IP addresses, has not been provided in public accounts of the incident.
- Email addresses
- Passwords (stored as hashes)
- Usernames
The real-world impact
Individuals whose forum accounts were included may face an increased chance of receiving targeted phishing messages that use their known usernames or email addresses. If the same passwords or similar ones were reused on other sites, those accounts could be at risk of unauthorized access. For the organization, the event highlighted the exposure of customer support channels that hold identifiable information even when they are separate from core product systems.
If your data was in this breach
Change the password on the affected Avast forum account and on any other service where the same or a similar password was used. Enable two-factor authentication wherever it is offered. Review recent account activity for signs of unauthorized access. Readers can run a free exposure scan of their email address to check whether their information appears in known breach data sets.
AICompiled with AI assistance from public sources and published under our editorial standards.
How this breach connects
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Read GalaxyWarden’s full analysis of the Avast Data Breach (2014) →
Verified breach. Breach data provided in part by Have I Been Pwned, used under CC BY 4.0.
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